We use our own product called Timmy at http://www.timmyontime.com http://www.timmyontime.com . To keep tracks of things, we write notes and tag them with whatev

We use our own product called Timmy at http://www.timmyontime.com http://www.timmyontime.com . To keep tracks of things, we write notes and tag them with whatever we need to. We use the search box or simply browse through note pages to get what we want. Example, you can create a todo note for your teammate like this : "#todo @franky please update the pricing on the homepage". It uses IM as an interface (though you could do it on the web).