I do a bit of PHP stuff, and here are a few little bits I've thrown together for my own entertainment.
Social media sharing buttons that respect your privacy
Serve a large ad or small ad on your page, depending on the width of the user's browser
Correctly format UK phone numbers (updated August 2010)
Publishing your Google Calendar on your website (updated June 2010)
Google Latitude: add your location to your website (new, 2 Nov 09)
Shorten links with your own shortlinks server (new, 15 Oct 09)
Get your 'a's and your 'an's right (new, 7 Jul 09)
Shorten links with bit.ly (new, 17 Dec 08)
Encoding Google Chart API values in PHP (new 6 Dec 07)
Reduce spam by hiding your e-mail address (updated 20 Aug 06)
Calculate your own age
Stop proxy servers or browsers caching your pages
Stop robots crawling your development site or 'wrong' address
Get your copyright date correct
Grab an accurate always-updating clock
See your SpamCop stats
Block Netcaptor
Read any e-mail on your Blackberry
A web file server, so you can share your files securely.
Want to use them? Go ahead: might be nice if you let me know where they are.
These are my personal views and not those of any employer - Full disclosure - Privacy - FAQ - Contact me - Ads/hosting: Not At All Bad Ltd