CgEddie is a very simple editor for writing and
compiling Cg shaders. It supports syntax
highlighting (and also semantics), auto
indentation, and multiple file editing. It uses
the nVidia Cg compiler to check shaders at run-time.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
New features include Cg function highlighting,
calltips for functions, new shader profiles (SM
3.0, GLSL), marking of compilation errors,
improved auto-indentation, and a toolbar with
icons.
Improved auto-indentation, highlighting of semantics and brackets, a standard wxWidgets "About Dialog", a better looking splitter control window, and many minor bugfixes. Font, indentation, and bracket highlighting color options can now be saved to a file in the user's home directory.