Documentation on using Mac OS X, biased towards the command line. For more tips, try Mac OS X Hints.
For more software and reviews, consult VersionTracker.
- Adium - chat program. I dislike the wasted space in iChat chat windows: Adium supports space saving display templates and tabbed windows. Though mostly I run irssi via a screen session elsewhere.
- Audio Hijack - the “perfect tool to record any audio on your computer”. Also consider LineIn.
- BBEdit - text editor I like, in addition to vi(1). For those on a budget, consider the free TextWranger.
- NetNewsWire Lite - freeware Really Simple Syndication (RSS) reader, good keyboard-based reading of news.
- Omnigroup Software: I use OmniOutliner Pro, OmniGrafflePro, and OmniWeb.
- play - command line sound playing utility.
- Quicksilver - keyboard completion for application, documents, and other resources. Also allows keyboard shortcuts, for example to lock the screen or open or bring forward a specific application.
- teleport - keyboard & mouse sharing software. Better than the various flavors of synergy.
- UnicodeChecker - search for, display, and convert Unicode character data.
- VideoLAN Client (VLC) - open source video player.