bash, ssh, screen, rsync, cron, gcc, perl/python/ruby, X, and excellent terminal emulation. Treat cygwin as just another unix variant and it will go pretty far

bash, ssh, screen, rsync, cron, gcc, perl/python/ruby, X, and excellent terminal emulation. Treat cygwin as just another unix variant and it will go pretty far. Windows native apps and virtualbox are guaranteed to cover any missed requirements.