Many business executives are looking for more ways to cut costs during these tough times and have a mandate to "do more with less." Open source software fits the bill perfectly as it has little or no upfront costs, licensing flexibility (often times you can install on as many PCs you want and for as much users as you need) , development flexibility (the source code and APIs can be customized, the platform and toolkits are readily available), and the fact that many open source projects actually have better and larger support communities than proprietary products.
This year may actually be a turning point in the adoption of open source software as projects steadily mature (think Linux and MySQL) and interest among corporate users grow. According to a report released by research firm Gartner in November of last year, the adoption of open source software is becoming pervasive among large multinational organizations. Of the 274 surveyed by Gartner, 85% said they were currently using open source in their enterprises and the remaining 15% said they expect to use it in the next 12 months.