Highrise is the new product from 37signals. I use Tada List and that’s pretty good; Backpack is also good but a bit clunky to use and doesn’t generally wow people.
Highrise though is in a whole new league, on the face of it it is just a nifty web-based PIM that allows you to organise contact information. Useful and a slick as all 37Signals stuff is. However recently I started using it to keep track of the tasks and calls that I have to make as part of moving house. Suddenly the application isn’t just nifty it’s indispensable! Each note is properly dated and related to the contact information. It instantly answers the questions like: when did I call the broker about the mortgage? who do I need to follow up about income guarantees?
Another genius product!