Archiving Libraries

SCZ 
[HTML] http://scz-compress.sourceforge.net/ 
[API] http://scz-compress.sourceforge.net/api.html 

QuickLZ 
[HTML] http://www.quicklz.com/manual.html 
[Examples] http://www.quicklz.com/download.html 

Zlib 
[HTML] http://www.zlib.net/zlib_docs.html 
[Examples] http://www.zlib.net/zlib_how.html 

source: http://www.gtkforums.com/about988.html