The Macintosh software information site MacUpdate has bundled 10 Mac applications together, including security and virtualization software, and is selling the lot for US$50, a nearly 90% discount.
Topping the list is a product that's more than worth the $50 price by itself: Parallels Desktop 5, one of the two leading ways to run Windows and Windows software on a Mac. Parallels Desktop 5 normally costs $80 on its own.
Another part of the bundle is the security package MacScan from SecureMac. MacScan guards against spyware and other malware and also gets rid of tracking cookies from sites on SecureMac's blacklist. MacScan costs $30 by itself.
The other packages in the bundle sound worthwhile although less impressive than those first two. Timeline 3D from Bee Docs, for example, creates 3D interactive timelines that can be incorporated into Keynote presentations -- it ordinarily costs $65.
Back-in-Time from Tri-Edre supposedly adds a form of revision control to Time Machine backups, letting you step backwards not only by date but also by previous versions of your documents; it costs $29 on its own.
Hyperspaces adds more features and functionality to OS X's Spaces virtual desktops feature: you can give each Space its own desktop image, snap back to your last space with one keystroke, and so on. Hyperspaces usually costs $13.