PXC is a new C-Crosscompiler-Project, based on PCC the UNIX(TM)-Original. Aimed at ISO-9899:99/201x Feature-Completness and easy retargeting. The Toolchain will consist of an Assembler, Linker, Librarian and an integrated MISRA-C-Checker.
EFM is a simple console (VT100) file manager for embedded systems.
AVRpal is an open source simple but powerful gui for avrdude on windows platform with an easy to use interface.It is an alpha release by CEMSTech supporting only USBasp programmer and soon it will be released as a full featured avrdude gui.