Last week we took a look at four great Linux/FOSS applications that are as good as any of their competitors, FOSS or proprietary. Today I'll wrap up with four more.

KDE, Gnome, OpenOffice.org and Firefox - all great software, and all powerful proponents of the free software software movement. But there are thousands of other applications out there that are worth trying. Here's the next 50 great apps!

If you want to put a boatload of useful open source applications on a computer or, as I do, on a pocket USB drive so that you can have them with you at all times, there are now some very fast ways to do this. MacLibre is a great way to get tons of good free, open source apps in one download for Mac users.

KDE, Gnome, OpenOffice.org and Firefox - all great software, and all powerful proponents of the free software software movement. But there are thousands of other applications out there that are worth trying.

Audio in linux, how to put it into words? How about: oss, alsa, pulseaudio, esound, arts, portaudio, jack, gstreamer, phonon. :googly: Did I miss any? Embarrassment of riches? Or just embarrassment?

Having many more eyes watching the code and a community of developers backing up users, open source security applications provide a wide range of options and made-to-order uses. Here's a list of 10 serious open source security applications, gathered via the word-of-mouth of the CSOs who use them.

Ubuntu Intrepid includes easy access to some great Linux applications. These unknown, but great apps will help users be more productive, and enjoy their Linux systems more than ever before

Despite the wealth of free applications out there, many small business owners continue to spend an inordinate amount of their all-too-scarce resources on software. Microsoft Office 2010? That'll be $499.99 -- or $279.99 if you can do without the Professional version. QuickBooks 2010? $159.95 or more. Adobe PhotoShop CS5? A whopping $699.

The educational community has discovered open source tools in a big way. Analysts predict that schools will spend up to $489.9 million on support and services for open source software by 2012, and that only includes charges related to operating systems and learning management systems.