gcombust is a CD burner GUI. It works as a GTK+ frontend for mkisofs, mkhybrid, cdrecord, and cdlabelgen. It has primitive support for controlling the directory (root) structure and size of an image without copying files/symlinking or writing 10 lines of arguments. It can also maximize disk usage by hinting at which directories/files to use.
GClipper is a multiple buffer clipboard that automatically fetches new selections and maintains them in a history. It shows a listview with the fetched selections and allows the visualization of their details. The selected row in the listview will be used to determine the data for selection retrieval (paste).
The ANTLR ANSI C and GCC source to source translation framework includes an ANSI-C parser which builds trees, a GCC parser which builds trees, a GCC tree parser (for you to subclass to do transformations), and a GCC tree emitter. The GCC parser is only for GCC's extensions to C, not C++. It is based on GCC 2.95.2.
The GNU Compiler Collection contains frontends for C, C++, Objective-C, Fortran, Java, and Ada as well as libraries for these languages. It is a full-featured ANSI C compiler with support for K&R C as well. GCC provides many levels of source code error checking traditionally provided by other tools (such as lint), produces debugging information, and can perform many different optimizations to the resulting object code.