Webbing
Originally published at RadDevon. You can comment here or there.
Zoho Creator
Sure, Zoho has an entire office suite. I'm embarrassed to say I haven't even looked at their other applications, but I am in love with this slick database application. It allows you to easily create online databases. It also includes an easy (albeit somewhat limited) scripting language called Deluge which allows for the creation of more robust applications. I currently have a database of movies I own which also keeps track of movies I have loaned out. I am also using it at work to track retired computer equipment and automatically e-mail the appropriate inventory clerk. I'm sure you could find hundreds of practical uses, though.
Clipperz
Clipperz is an online password management utility. It sounds a little scary, I know. I was scared, too. So, for a few months, I used an offline password management program called KeePass. It's cool and works great, but I found it was a real pain to whip out my thumb drive and load the software every time I wanted to store a password. Clipperz gives me an easy way to manage the passwords from any location. They are encrypted before they are sent to the server which gives a greater degree of security. It also has a direct login feature which will, in many cases, allow you to click a single link from your Clipperz page to automatically login to one of your password-protected web sites.
MapMyRide
Map your bicycle routes with this Google Maps mashup. Keep track of your training. This tool shows the mileage of your ride. It's not quite as universal as the other tools profiled here, but it is certainly as ubiquitous for those of you who are into bike riding and want to track your training.