FOX Development Libraries: http://cyberia.cfdrc.com/FOX/fox.html
Hills Design Group: http://www.linuxsupportline.com/~davin/
Linux Journal: http://www.linuxjournal.com/
The Official RPM Home Page: http://www.rpm.org/
RPM Documentation Project: http://www.rpmdp.org/
Salmar Consulting Inc.: http://www.salmar.com/
The WINE Headquarters: http://www.winehq.com/