Where can I find some cool Twitter toys?

There's a Twitter Fan Wiki  with a long list of Twitter Toys for various operating systems and environments.  My favorite is twitterbar, a Firefox extension that lets me type tweets into the address bar.  But there are many there I have not tried!

You might also find this useful...

I had to stop after a while for fear of not doing my work, but I fully intend to go back and check out these toys later on today... 

If you are using a portable computer (laptop) and connect to WiFi hotspots in different places (coffee shops, office, libraries, public areas etc.) then you can use a cool software tool from WeFi.com -

When you register with WeFi, you can enter your Twitter ID, and then every time you connect to a WiFi hotspot, it will automatically tweet a message about that, something like "SearchJane has just connected the Internet from Starbucks, Union Square, San-Francisco".

It is still in Beta so there are some things to improve, but it is really cool.