The Bitcoin project is an open source community that creates the cryptocurrency. The community has been in existence since 2009 and it has no central authority. The software is distributed under the GNU General Public License and the program code is published for free use. You can create new bitcoins and the network uses a peer-to-peer network protocol.
The Git is a version control system (VCS) that is commonly used in Open Source software. If you use open source software, you must cite the author of the project. If you use an open source license, you must keep the source code for your modifications. In other words: you should use the Git and credit the author of the software.
In other cases, open source software is licensed under the terms of the GPL and they do not comply with the Open Source Definition. The GPL has more conditions for software distribution than open source licenses. Note that some open source licenses are incompatible with the GPL.
The Wine project is an open source community that creates tools to emulate Windows programs under Unix-like operating systems. This community accepts donations (called the Winehq foundation) and most of the software projects are distributed under the GPL. You can think of Wine as a Linux Distribution that allows you to run Windows software on Linux (in fact, the first project to use the name Wine was a project to emulate Windows applications on Linux).
The Tor project is an open source community that creates anonymous communication tools. Tor software is distributed under the GPL and it is distributed for personal use. The main goal of the project is to provide anonymous Internet access to people who are being targeted by governments or companies.
The MATLAB environment is based on the MathWorks MATLAB® Compiler, or MMC, which is a proprietary language developed by MathWorks to facilitate the building of applications. MMC understands the MATLAB language and various task APIs and provides efficient intermediate language compilers for compiling functions and scripts.
The MATLAB® Engine is the core of the MATLAB product. It compiles, executes, and interprets MATLAB scripts and programs, as well as runs the M-files and M-links created by the MMC. It also allows the exchange of data between MATLAB applications, the MathWorks M-files and M-links, and other programming languages, including C, C++, and Visual Basic. 827ec27edc