Regina

BeBits - Regina Rexx
Download page for BeOS port.
http://www.bebits.com/app/1236

Debian GNU/Linux - regina-rexx
Interpreter package and curses interface.
http://packages.debian.org/stable/interpreters/regina-rexx.html

Dennis Bareis's Freeware
Selected Regina versions for download, information on bugs and conversion issues.
http://dennisbareis.com/regina.htm

Patrick TJ McPhee
Function packages for Regina. w32funcs, RegUtil, FileUT, amath.
http://pages.interlog.com/~ptjm/

Windows NT Resource Kit
Outdated Regina interpreter included.
ftp://ftp.microsoft.com/bussys/winnt/winnt-public/reskit/nt351/