Free Open Source

Endless Sky is a free, open source space exploration game. It is a remake of the now ancient game, Escape Velocity, but offers similar sandbox space trading and galaxy exploring simulation as Elite: Dangerous or Star Control. Others liken Endless Sky to a quick, downscaled fix of the enormous space-MMO, EVE Online.

• Free Open Source Project Management Software
• 100 Best Open Source Programs

1. RapidSMS is a complete SaaS-based free and open-source bulk SMS software solution for customers who don't want to purchase any software. It offers hassle-free, and quality tested customized SMS solutions.
2. As with all of these ecommerce platforms on the list, it's free, open source and self-hosted. X-Cart is often considered one of the fastest open source platforms on the market, and it also has an incredible number of features for you to sink your teeth into. There's also a free trial for the premium plan, which goes for $495 (one-time payment).

What is a bare-metal hypervisor?

The Hypervisor is a software layer that allows the user to control and monitor Virtual machines. It allows users to run multiple types of guest operating systems on a single host machine. For example, we can run Windows 10, Ubuntu, Redhat, and more OS on a single Linux /Windows/macOS host machine to test or run different software. You can also call it Virtualization software that we used in our day to day life such as VirtualBox and VMware Workstation.

Now, what is the difference between VirtualBox kind of software and bare-metal hypervisor?

So, both are a kind of hypervisor, or shall I say Virtualization software technology, however, the way they work is different. The open-source VirtualBox, VMware Player, and other such kinds of Virtualization software fall under Type 2 Hypervisor; while bare-metal virtualization software is Type 1 hypervisors.

Actually, the Hypervisor technique is divided into two categories: Type 1 and Type 2 virtualization technology.

Type1 hypervisors:

Hypervisor or Virtualization software that falls under the Type 1 has direct contact with the physical hardware. Direct handling of the hardware increased the efficiency and performance of the guest operating system running over it. Such kinds of Virtualization operating systems also called Bare-metal Hypervisor. Mostly they are used in Datacenters or in a cloud environment or by enterprises.

Free Open Source Project Management Software

Type 1 hypervisor examples: Microsoft Hyper V, Oracle VM Server for x86, VMware ESXi, Oracle VM Server for SPARC, open-source hypervisor distros like Xen project are some examples of bare metal server Virtualization…

Type2 hypervisors:

Type2 Hypervisors are commonly used software for creating and running virtual machines on the top of OS such as Windows, Linux, or macOS.

Type 2 hypervisor examples: The perfect examples of Type2 are VirtualBox, Qemu, VMware Workstation Player, and Parallel. You can call them the best hypervisors for home-usage.

Running virtual guest operating systems over the host operating not only consumes lots of resources but also needs host permission to reach the hardware; which adds an extra layer of complexity, hence decreases the performance as compared to Type1 virtualization.

Here in this article we only talk about the free and open-source Type1 Virtualization software. However, if you have time you can dwell on this article: Best Free Virtualbox Alternative for Linux

Before moving further, you should know more about the types of virtualization technology. There are four types of virtualization methods that are commonly used in today's world.

• FV: Full Virtualization
• PV: Para Virtualization
• OSV: Operating system virtualization.
• HAV Hardware-Assisted Virtualization.

You can test below the bare-metal hypervisor on a laptop or your PC/server to experience the power of Virtualization.

Best Free & open-source bare-metal hypervisor (foss)

Xen Project

Xen is an open-source software platform or Linux hypervisor distro maintained by the global community of developers It supports virtualization for x86, x86_64, IA64, ARM, and other CPU architectures. The Xen hypervisor is an enterprise-class alternative to proprietary virtualization platforms and hypervisors for x86 and IA64 platforms. Besides the open-source, it also available in the commercial version from Citrix.

Xen hypervisor is a kernel-based virtual machine platform that can virtualize a wide range of guest operating systems such as Windows, Linux, BSD, and its other versions. It used by so many commercial platforms for server virtualization, Cloud platforms (Amazon, Google, Cisco, and more) Infrastructure as a Service (IaaS), security applications, and more… Supports multiple Cloud platforms: CloudStack, OpenStack.

Download:Xen Project

XenServer Open source

XenServer hypervisor runs an open-source type-1 or bare-metal hypervisor available in three versions: community, standard, and enterprise. However, the ISO file is the same for all versions. Ireal pro 10 0 0 cr2 download free. The free version offers basic features that include hypervisor including capabilities like VM migration, Health check, snapshot, and more. Whereas the standard one is meant for SMBs along with Citrix support. The last Enterprise one suitable for large organization offers supports and live patching and Windows update support. Being a commercial product, it is one of the best free hypervisors.

Download Xen Server (link)

Oracle VM Server for x86

Oracle VM Server for x86 is a free Type1 virtualization platform that uses open-source Xen hypervisor technology. It is an enterprise-class hypervisor that includes an integrated Web-based management console. One can download it from the official website page Oracle Software Delivery Cloud. Since being a commercial featured product, one needs to create an account on the Oracle website then only he can get the ISO file of this bare-metal hypervisor.

Linux KVM

Linux KVM( Kernal Based VirtualMachine) is another Type -1 hypervisor that is a base for different Linux hypervisor distros. Furthermore, it can convert different operating systems such as Redhat, OpenSuse, Centos, and Ubuntu into a full virtualization platform.KVM is acquired by the RedHat and supports all most all Linux, BSD, Solaris, and Windows operating systems as a guest. The administrator can control and manage the KVM installed virtual server either by command line or via a Graphical user interface (GU) provided by VirtManager. It supports x86 hardware containing virtualization extensions (Intel VT or AMD-V). By default, it is a command-line tool.

Proxmox- Open-Source Virtualization Platform

Proxmox VE is a complete open-source virtualization management platform that closely integrates two virtualization technologies: KVM (Kernel-based Virtual Machine) hypervisor and Linux container (LXC) to provide enterprise-class virtualization.

Proxmox VE also supports Paravirtualization (virtIO drivers for network, Grafik, hard disks); also HAV is possible with Proxmox VE.

Proxmox VE is based on Debian GNU/Linux and uses a customized Linux Kernel. The current stable 5.x release uses the latest Ubuntu 18.04 based kernel, which will be regularly updated. It supports full virtualization (with KVM) and container-based virtualization with LXC.

The Proxmox Open-Source Virtualization Platform has a monolithic system that provides three major functionalities of computing, network, and storage in a single package. It offers both command line and graphical user interface to control, deploy, destroy, monitor, and manage containers and virtual machines. Scalable and easy to use option for data centers, one must try it once.

DownloadProxmox (Link)

Openvz

It is another enterprise approach hypervisor with a bit different approach because it is an open-source container-based virtualization platform for Linux. If you want to create your own Virtual Private server then try out the OpenVZ.

So, what exactly is it, the OpenVZ is a free and open-source offered by Virtuozzo, now. It comes with an ability to create multiple virtual machines in an isolated Linux container. This means the admin can treat each container as a standalone server. All the containers can reboot independently on a single physical server just like we do in VES and VPS environments provided by different cloud hosting companies. OpenVZ is also a Linux hypervisor distro available for bare metal installation. OpenVZ provides a web interface.

Download OpenVZ ISO (Link)

Extra Information: Non- Bare Metal virtualization options…

oVirt

oVirt is an open-source distributed virtualization solution developed for Linux operating systems such as RedHat Enterprise, CentOS, Scientific Linux, Fedora 28, and also available as oVirt Node which is CentOS based. It is a Linux KVM hypervisor designed for enterprise infrastructure.

oVirt built upon several other community projects, including libvirt, Gluster, PatternFly, and Ansible.

Download oVirt (Link)

SmartOS

SmartOS is a free and open-source SVR4 hypervisor based on the UNIX operating system that combines OpenSolaris technology with Linux's KVM virtualization. It employs NetBSD pkgsrc package management.

Download SmartOS (Link)

Note: VMware ESXi is not a FOSS project but free to download and use. It is here just for knowledge…

VMware ESXI

If you have the perception that all VMWare products are paid then you didn't check thoroughly. Because there are some products those free and VMware vSphere Hypervisor (ESXi) is one of them.

VMware free ESXi is another best free hypervisor for creating a virtual environment to install different operating systems. After the installation, the user can connect the virtualized Vmware server using the Vsphere client. That gives an easy to use a graphical user interface to create, deploy, destroy unlimited VMs. Being a part of a commercial entity, it supports a wide range of server hardware and well optimized to run virtual servers for production usage. The user needs to enter the free license key to use the Vmware Type1 hypervisor otherwise it will expire after 60 days.

Download Vmware free ESXi (Link)

Free Hyper-V server 2019 Standalone

The standalone version of the Hyper-V is a free product from Microsoft and available to download free of cost. However, there are some disadvantages of the standalone version, it doesn't come with GUI, yes it is Microsoft product without a graphical user interface plus less drive support, roles, and hard to manage. Still, if you want to try the standalone product you are free to go. However, I recommend the Windows server rather just alone hyper.

Oracle VirtualBox

Those are familiar with virtualization they would already know about the VirtualBox. It is the best Type-2 Virtual machine creator platform available for almost all mainstream operating systems such as Windows, macOS, FreeBSD, and macOS. The interface is super easy to understand and use. Even a new user can easily install it and start creating virtual machines in a few minutes.

So, these are few free and best open-source bare-metal hypervisor options, if you are using any of them or some different, let us know your experience.

Other Useful Resources:

Noteplan: markdown calendar 1 6 27. 'What are the best open-source Blu-ray/DVD ripper software for 2020? Do they all work smoothly in ripping Blu-ray or DVD movies? What are the differences between them? Please show me some examples.'

It's necessary for us to learn what 'open source software' means before we proceed to the 2020 5 best open source Blu-ray/DVD ripping software. When we say a piece of software is open source software, we mean that the source code of this software is freely available to anyone to inspect, modify and enhance. It doesn't mean that the software is free of charge, though in most cases it is. With open source software, you could design other software tools that may have the same functions as the open source software has.

Now, let's take a look at the below content to learn what the 2020 5 best open source Blu-ray DVD ripping software tools are.

Part 1: 2020 5 Best Open Source Blu-ray&DVD Ripping Software

Let's first check the list of 5 best open source Blu-ray&DVD ripping software below.

MakeMKV

100 Best Open Source Programs

MakeMKV, current version 1.14.3 released on March 10, 2019, is a semi-open source DVD ripper for Windows, Mac, and Linux. Its GPU, MKV multiplexer, and optical drive query library are open source. It charges for Blu-ray converting and streaming functionality after 30-days trial period, but it is free of charge for DVD conversion. With a simple interface that doesn't have additional and confusing options, MakeMKV is a great choice for beginners to rip DVDs (including some copy-protected discs) to MKV, a format that can store multiple video, audio, subtitle tracks and metadata.

But inevitably, MakeMKV is unable to please all people and keep good performance all the time. Its output is limited to MKV. Very restrictive. And the file size of resulting file is always a few gigabytes. Most people have to downsize it using a third-party program. Additionally, this program will crash when dealing with some movie DVDs, make some subtitles screw up, make video audio out of sync, and other issues, according to users' feedback online.

HandBrake

HandBrake is undoubtedly the most popular one among all those open source DVD rippers. It is free, clean, and available for Windows (10 and lower), Mac, and Linux. Plus, it is rich in features. HandBrake allows users to rip DVD disc, VIDEO_TS folder, and also ISO image to MKV or MP4. Additionally, it has a collection of output presets for some popular devices such as iPhone, iPad, Android, and Windows Mobile. Apart from format and preset, this open source DVD converter also gives you a great many options about dimensions, filters, video, audio, subtitles and chapters. It is great for advanced users, but probably not for newbies. They will be get confused and export poor-quality files because of improper settings. However, it should be noted that HandBrake requires libdvdcss to handle copy-protected Blu-ray/DVD content.

Freemake Video Converter

Freemake Video Converter is also an open source DVD ripper freeware that can rip DVD discs quickly. It has a clean and well-organized interface for average users. There will be a small watermark in your ripped DVD video. If you do not mind, you can free download the DVD ripper to convert DVD to MP4 format.

DVDShrink

DVDShrink is another free DVD ripper you can use to copy and rip DVD to ISO image or DVD folder. DVDShrink isn't an open source program that can directly convert DVD to MP4 or another mainstream video format for broad compatibility. Instead, DVDShrink can convert DVD to ISO file or DVD folder first and then you can use another tool to convert ISO or DVD folder to your desired video format. DVDShrink can only work on Windows. Superior to HandBrake, this Windows-based open source DVD ripper is possible to rip some copy-protected DVDs by making use of its inbuilt decryption algorithms. But because it has been discontinued for years, it is possibly unable to deal with newer copy protection schemes, such as Disney X-project DRM.

VLC Media Player

VLC Media Player is a cross-platform and open source DVD ripper developed by VideoLAN. You can free rip DVD, ISO image and VIDEO_TS folder to MP4 and other video formats on multiplatform. Since VLC is also a media player, if you want to rip and convert DVD movies to videos, you have to get a practical tutorial on using VLC to convert DVD movies. It also should be noted that VLC media player is not able to handle the copy-protection removal upon DVD discs. You may have to install 3rd-party disc decrypting tools as assistant.

Part 2:The Most Powerful Blu-ray&DVD Ripper - Leawo Blu-ray Ripper

All the above-mentioned open source Blu-ray/DVD ripper tools are free to use. However, when it comes to some disc decrypting issue, there always happens some errors, the most frequent error is decrypting error. Some of these open source software tools could only handle DVD content, but no Blu-ray content. Therefore, we would like to recommend you the best alternative to these open source Blu-ray/DVD ripper software tools – the most powerful Blu-ray/DVD ripper – Leawo Blu-ray Ripper.

Leawo Blu-ray Ripper is a professional Blu-ray ripping software tool that could decrypt Blu-ray discs with all protection and from various regions, and convert Blu-ray to MP4, AVI, MKV, MOV, WMV, etc. for various devices and players. It could help you easily get region-free Blu-ray movies in lossless MKV files or other formats for playback on various devices. Its superb performance in disc decrypting and region restriction removal has been highly praised by worldwide Blu-ray movie fans. It could complete all tasks the 5 open source Blu-ray/DVD ripper software tools mentioned above could do, and even those the above 5 tools can't do.

Leawo Blu-Ray Ripper

Download Leawo Blu-ray Ripper and install it. Note: It's a built-in module of Leawo Prof. Media.

Step 1: Add Blu-ray/DVD source movies

Open the 'Convert' module and then click 'Add Blu-ray/DVD' button to browse and load source Blu-ray/DVD movie files. You could add Blu-ray/DVD disc, folder and/or ISO image file.

Note

1. There are 3 options for content loading after adding the movie to the program: Full Movie, Main Movie and Custom Mode. Full Movie allows you to import all titles, and Main Movie only imports the longest title by default while you can freely choose titles under Custom Mode. Choose 'Full Movie' mode.
2. After loading source 3D Blu-ray movies, you could choose the subtitles and audio tracks, play back loaded Blu-ray movies, edit Blu-ray movies, apply 3D movie effect, etc.

Step 2: Set output format

Click the drop-down button right before the big green 'Convert' button and then on the drop-down panel choose 'Change' option. Now you've come to the 'Profile' window. Go to 'Format' or 'Device' group to choose desired output format, say MP4 Video from 'Format > Common Video' group.

You could adjust video and audio parameters for output format. After setting output format, open the drop-down button right before the big green 'Convert' again and then choose 'Edit' option to enter the 'Profile Settings' panel, which lets you adjust video and audio parameters of output format, including: video codec, quality, bit rate, frame rate, aspect ratio, channel, audio codec, resolution, etc.

Step 3:Set output directory

After setting output format, click the big green 'Convert' button. Then, on the pop-up sidebar, set an output directory in the 'Save to' box.

Step 4: Start converting Blu-ray/DVD movies

After that, click the bottom 'Convert' button to start converting Blu-ray/DVD movies with this Blu-ray ripper software.

Configured with multiple GPU acceleration technologies, Leawo Blu-ray Ripper is 6X faster than other tools to complete Blu-ray/DVD movie converting.

Part 3: Comparison Between 6 Blu-ray Rippers

The below table shows you the differences between these 6 Blu-ray/DVD ripper software tools.

Part 4: Conclusion

Obviously, as a non-open source Blu-ray/DVD ripper software tool, Leawo Blu-ray Ripper actually performs excellent in Blu-ray/DVD to video/audio converting. It has more functions and features than the other 5 open source Blu-ray DVD ripping software tools. If you want a free Blu-ray/DVD ripper tool, the 5 tools would be a wonderful choice. However, if you wish to get a more comprehensive Blu-ray/DVD ripper that could actually helps you handle all Blu-ray/DVD conversions without obstacle, Leawo Blu-ray Ripper would be the perfect choice.