InfoWorld has a special report discussing a number of open-source applications:
If you’ve ever had difficulty deciding between developing an application in-house or purchasing one off the shelf, then open source may be for you. The combination of free access to source code and a worldwide community of developers gives you the best of both worlds. You have the luxury of starting with a mature code base, to which you can add features as your business needs grow.
As recently as a few years ago, however, open source options were limited. Other than Linux, the Apache Web server, a few database servers, and an assortment of developer tools, the open source community didn’t have much to offer in terms of turnkey software. The foundations were there, but full-fledged applications were lacking.
Fortunately, that’s changing. Individual developers and companies alike have flocked to the open source development model. Today there’s a veritable cornucopia of free business software available — from CRM to content management, portals to RFID — some of it remarkably sophisticated.