Stacktop is a Mac client for accessing most of the Stack Exchange sites. This is an auto-search app where you input keywords every 10 minutes or so it'll search SO and tell you if there are any questions that haven't been answered that are about whatever your tags are.
FileZilla (ported from Windows) is a fast and reliable FTP client and server with lots of useful features and an intuitive interface.
App that stores/retrieves notes, providing a nonconformist solution to mental blockages & retrieval handicaps.
