“pianobar” is a free/open-source, console-based replacement for Pandora ’s flash player. Create, delete, rename stations and add more music. Rate and temporary ban tracks as well as move them to another station. “Shared stations”, last.
Pithos is a Pandora client for the GNOME Desktop. The official Flash-based client is a CPU hog, and Pianobar is command-line only. Neither integrate with the desktop very well, missing things like media key support and song notifications.
Pandorita is a native Mac OS X client for the internet radio service Pandora. It is written entirely in Cocoa, and built to be lightweight, easy to use, and fully functional. Internally it uses the amazing pianobar library to communicate with Pandora's server.
Play Pandora from your Mac menu bar. A native app for Mac that stays in your menu bar (and doesn't clutter your dock while it's running). Allows you to control song playback and give your songs thumbs up/down ratings.