Mac OS X only: New task manager Things, now in alpha testing, is a promising new option for Mac users looking to get organised on the desktop. Structurally, Things categorises tasks in a very Getting THINGS Done way (get it?), with an inbox, projects, and "next" (or Next Actions) view, as well as support for contacts to whom you may delegate tasks and tags (which you can use for context.) After the jump, check out some screenshots of the alpha version of Things.

Windows, Mac and Linux: A preview release of the highly-anticipated, cross-platform, open source personal information manager Chandler is now available for download, and while it's still got kinks to work out, it looks as promising as its vision. Called the PIM "for people who use their Inbox as their task list, Chandler picks up where your Inbox leaves off." Chandler's essentially a combination calendar, email inbox and task list for the individual, as well as a collaboration tool for small groups. The Chandler developers say:
Our goal is to serve the way people actually work, independently and together, particularly in small groups, a market segment we believe is underserved. Our belief is that personal and collaborative information work is by nature iterative and that the existing binary Done/Not-Done, Read/Unread, Flagged/Unflagged paradigm in productivity software poorly accommodates the reality of how people work.

We already walked you through beta 1 of the next major Firefox release, version 3.0, and today Mozilla released beta 2 for download by willing testers and impatient 'fox users. The second beta plugs memory leaks (yippee!) and adds features like a new URL auto-complete display, smart bookmarks folders, and revamped download manager. Get more details about beta 2 goodness after the jump.