Integrated Development Environment for some microcontrollers based on 8051(e.g. AT89S8253). Supported languages are Assembly and C. It has its own simulator, assembler, editor and many other tools. See the project web site for more details and the newest updates.
The NT POSIX C Runtime Library is an IEEE standard runtime library for the NT POSIX subsystem. It can be used as a complete replacement or a side by side alternative for what is shipped with the Interix SDK.
YAGARTO is a cross development environment for the ARM architecture, running on a Windows host. It includes the GNU C/C++ toolchain and the Eclipse IDE.
zDevStudio is an open source cross-platform IDE based on Pasmo compiler designed to help coders and retrocoders to develop software for Zilog Z80 8 bit CPU.
The XBuildStudio is C/C++ development environment(like the VC IDE) for UNIX/LINUX console applications.it runs on a Windows OS, but compiles and debugs applications on UNIX/LINUX OS.
RES is a pure Java based Open Source Cobol to Java translator. It creates maintainable Java code for a subset of VS Cobol syntax. It has been developed with JDK, JTB and Javacc.
AMMORIA (ARAB) is an object oriented programming language uses Arabic words instead of English words, to make learning programming for Arab children easy and fast, it's planned to support Urdo and Farsi too, AMMORIA has its won IDE and Visual stuff.