A slightly older post from January 2009, but still a good one. Paul Stamatiou writes about 100 Applications and Services that he uses each day:
It took me a while to get used to using something other than simply Twitter.com, but I have fallen in love with TweetDeck. The Adobe AIR-based application does have its obvious performance drawbacks and crashes at least once per day, so there are better alternatives. EventBox is becoming popular but I did not like the RSS aggregator-esque interface when I tried it out.
As you’ll find, it’s not quite 100 services, but it is a pretty good list and interesting insights into how one person successfully uses social media and other development tools within a startup.