Christina has published a nice list of 50 apps to get your office on open source software. This is a worth bookmark page:
Open source software has a lot to offer the business world. Aside from the fact that they’re generally free, many open source programs are more secure, reliable and customizable than their proprietary counterparts. In fact, many large companies, including big names like Amazon, Google, and Yahoo, run their servers with Linux rather than Windows. Open source software is often some of the best software for the job, even when cost is no consideration. So how can you make open source software work for your business? Here are 50 apps that can help your office get on track to join the growing numbers of businesses that have made the switch to open source.
The intention seems to be good, but there are few errors. For example Skype is not open source or GNOME is not Linux distribution. I hope author will fix out errors.