Networking
The WhatISmyIP clone is a perfect way to get a money earning site up quickly.
More Info 
Developer: CloneScriptSoft.com
License: PHP License
Operating System: Linux
Sijio is an easy to use and fully customizable almost FREE ($8.
Developer: Sijio
License: Free for non-commercial use
Operating System: Linux,Linux Console,Linux Gnome,Linux GPL,Linux Open Source,Unix,Win2000,Win7 x32,Win7 x64,Win98,WinMobile,WinOther,WinServer,WinVista,WinVista x64,WinXP
Dolphin is PHP, MySQL, XHTML based community script.
Developer: Lyubov
License: Unknown
Operating System: All
Open-Source PHP extensible socket server engine.
Developer: Jerome Doby
License: PHP License
Operating System: Windows, Unix
Customizable, user friendly open source social networking portal software with features like blog, forum, chat, gift shop,job poratl,point system etc.
Developer: iScripts
License: Open Software License
Operating System: Linux,Windows
Manage your network with a free Network Monitoring Software application.
Developer: Network Monitoring Software
License: GNU General Public License (GPL)
Operating System: Windows, Linux, Unix
Vyatta OFR (Open Flexible Router) is an open-source software that is designed to transform any standard x86 hardware into a full-featured network routing & firewall solution.
Developer: Tom McCafferty
License: GNU General Public License (GPL)
Operating System: Platform Independent
This whois scripts gives you an attractive interface to check domain informations.
Developer: PhpToys
License: GNU General Public License (GPL)
Operating System: ALL
Lookup your IP Address and know your location at the map.
Developer: dora katokan
License: GNU General Public License (GPL)
Operating System: Unix
NetworX is social networking software that allows you to create your own private community for anything that interest you.
Developer: Mike
License: GNU General Public License (GPL)
Operating System: PHP/mysql compatible