Your company's IT department probably depends on at least one open source application. The software does the job, is budget-friendly, and it has an active open source community which is constantly upgrading the application. But few applications are perfect, whether proprietary or open source. While the software may do most of what your business needs, you may consider having a few in-house developers add customizations. That's a perfectly reasonable idea. But there may be a better way that benefits the community, is dirt cheap, and oh yeah - is also fun.