Friends
Are you too embarrassed to show your friends your online web site because it doesn't look as good.
More Info 
Developer: Rohit Seth
License: GNU General Public License (GPL)
Operating System: Linux & Windows
BeholderBoard lets friends play chess on your web server.
Developer: http://www.beholder.co.u...
License: Freeware
Operating System: Unix
Friends Of Scouting (FOS) and many other community / organizational goal setting situations use a big red thermometer to show the current status of the fund raising campaign (and other things).
Developer: http://www.arkie.net/~sc...
License: Freeware
Operating System: All
Add to your site to Invitation Form from where users can invite their friends by filing the form.
Developer: KB
License: Freeware
Operating System: Linux, Unix, Windows
This page demonstrates a simple tell-a-friend function.
Developer: Aspiring Geek
License: Freeware
Operating System: All
Allows users to notify one or multiple friends about your web site.
Developer: Ascad Networks
License: Freeware
Operating System: linux
The Snitz Forums 2000 Community is an ever growing group of developers and friends that enjoy working together and learning from each other's experiences in programming.
Developer: http://forum.snitz.com/
License: Freeware
Operating System: windows
PHP/MySQL Discussion Forum with frames-based layout, reply-to-user, e-mail notification, HTML-posting, signatures, friends & killfiles, user promotion/demotion and full admin tools.
Developer: Veronica
License: GNU General Public License (GPL)
Operating System: OS Independent
Family Connections makes it easy for people with little to no web design experience to create a fully functional, feature packed, family website.
Developer: Ryan Haudenschilt
License: Unknown
Operating System: All
Family Connections makes it easy for people with little to no web design experience to create a fully functional, feature packed, family website.
Developer: Ryan
License: GNU General Public License (GPL)
Operating System: platform independant
SuperTuxKart is a a kart racing game featuring Tux and friends.
Developer: supertuxkart
License: GNU General Public License (GPL)
Operating System: OS Portable (Source code to work with many OS platforms)
A Chinese Chess (xiangqi) game for Linux and Windows.
Developer: xiangqi-chess
License: GNU General Public License (GPL)
Operating System: All 32-bit MS Windows (95/98/NT/2000/XP), All POSIX (Linux/BSD/UNIX-like OSes), Linux
Typespeed is a tool and game for testing your typing speed.
Developer: typespeed
License: GNU General Public License (GPL)
Operating System: All POSIX (Linux/BSD/UNIX-like OSes)
JavaRisk v2 is a strategic game roughly based on the board game Risk.
Developer: javarisk
License: GNU General Public License (GPL)
Operating System: OS Independent (Written in an interpreted language)
Friendika is a distributed social network or Facebook alternative.
Developer: Mike Macgirvin
License: BSD License
Operating System: PHP/MySQL/Apache
Twitter is a social networking and micro blogging platform that lets users send text updates via web, SMS and instant messaging.
Developer: clonemonster
License: Open Software License
Operating System: Not Available
DMS is a up and coming Membership script.
Developer: Christopher Hicks
License: GNU General Public License version 3.0 (GPLv3)
Operating System: Not Available
DUclassmate is a free Classmates Listing & Friends Search Web application.
Developer: http://www.duware.com/pr...
License: Freeware
Operating System: Win NT/2000/XP
It really hasn't been any easier to sign up and enjoy the benefits of using your own free chat and java applet utilities for your website, whether it be for communicating with essential business clients, or chatting with friends and family on a safe, free-speech network.
Developer: Scott Random
License: Freeware
Operating System: Linux, Unix, Windows
HiCalendar is Unix compatible.
Developer: http://www.hibyte.co.uk/...
License: Freeware
Operating System: Unix