Windows only: If our recent coverage of the Digsby-debacle has you down in the dumps over the departure of Digsby from your hard disk, you might want to check out Triillian Astra—fresh from beta and ready to go.
Cerulean Studios, the outfit behind Trillian, made an announcement today that Trillian Astra is out of beta and looking more polished than ever. If you're into the gritty details you can check out the extensive change log of the newest release. If you're more curious about the overall package check out the Trillian Astra feature list. Trillian Astra is currently available for Windows only.