Vine Server 
[en] Vine Server is a full featured VNC server for Mac OS X providing remote access to the GUI, keyboard and mouse using Vine Viewer or any other VNC client.
neosx/index.html
TextMate
[en] TextMate brings Apple's approach to operating systems into the world of text editors. By bridging UNIX underpinnings and GUI, TextMate cherry-picks the best of both worlds to the benefit of expert scripters and novice users alike.
WebServerXKit
[en] The WebServerXKit installer package provides an easy way to install Apache, PHP, MySQL and Ruby On Rails on Mac OS X Client. All in ONE Mac OS X Package file !! The server can be easily managed via a nice Preference Pane.
Vine Viewer
[en] Vine Viewer is a feature-rich and well supported VNC viewer. VNC client.
dex.html
Locomotive
[en] This is a simple tool to help you develop Ruby on Rails applications on Mac OS X.
Postfix Enabler
[en] Postfix Enabler helps Mac (for Tiger) users set up a totally-functional buzzword-compliant mail server in less than a minute, the Mac Way. It sets up SMTP, POP3 and IMAP services, with or without SSL support.