Eric Maierson

AIM – AOL and .mac instant message client
Bookmarks – scroll through your del.icio.us tags and bookmarks
Circulator* – keep track of loaned books and CDs
Cube Runner – great first-person flying game
Exposure – Flickr viewer
Facebook – facebook client
Hanoi - drag-and-drop logic game
Koi Pond* – not exactly a game, but amazing graphics and interaction
More Cowbell – “I got a fever…”
Othello – classic board game
Showtimes – awesome movie finder, with maps, showtimes, and reviews
TipStar – fast tip calculator
Todo* – list manager
Twitterrific – twitter client
Urbanspoon – restaurant locator
WordPress – remote blogging tool

All free unless indicated by *