EVE - small + portable vector editor but so much more

http://www.goosee.com/

Reading and writing spreadsheets with PHP

http://devzone.zend.com/article/3336-Reading-and-Writing-Spreadsheets-with-PHP

Free PDF Converter and Creator

http://tinypdf.com/

Create your own user-defined services on Windows NT/2000/XP/2003

http://www.tacktech.com/display.cfm?ttid=197

Fast MP4 to AVI conversion trick

http://portablefreeware.com/forums/viewtopic.php?p=11293#11293

more portable WAMP installations

The Uniform Server
http://www.uniformserver.com/

WebServUSB
http://www.webservusb.com/features.htm

USB WebServer
http://www.myportables.net/forum/index.php?showtopic=1250&st=0

Accessing an HTTP proxy using SSH tunneling

http://kimmo.suominen.com/docs/proxy-through-ssh/