POSIX

HP e3000 Jazz Web Server
HP's download site for Unix to MPE/iX POSIX ports. Also papers on POSIX porting.
http://jazz.external.hp.com

IEEE Portable Application Standards Committee
Website for the standards committee responsible for the POSIX standard.
http://www.pasc.org/

Lars Appel
Home page of HP engineer Lars Appel. Open Source software ported to MPE/iX including GNU autoconf, GNU wget, TIFF Library and Utils, NetPBM (pbmPLUS), GNU GDBM, LDAP for MPE/iX, GNU texinfo, Apache JServ, and Samba.
http://www.editcorp.com/Personal/Lars_Appel/index.html

Mark Bixby - Home Page
Bixby was the first to port a number of Unix programs to HP 3000 POSIX including the Apache server. Most of the ports listed here can also be found on HP's Jazz server.
http://www.bixby.org/mark/