Razuna

Razuna is a specialized kind of content management called digital asset management (DAM), which comes into play at companies that have large inventories of digital assets such as video and high resolution photographs. In years past, this probably would have been mostly media companies, but as more companies collect these types of digital assets, it's becoming increasingly necessary for other companies to manage this content in a digital asset management system. 

For starters Razuna is platform independent, meaning it works under Windows, Mac or Unix and Linux. It boasts a sophisticated search engine, an essential part of any content management system, but especially one that is designed to store and reuse digital assets. In addition, it has its own content management system (or you can use it in conjunction with an existing one).

You can install Razuna on your own hardware, but it also offers a hosted solution, which gives you an option with a very low overhead investment and a fixed yearly cost for digital asset management. Razuna also offers consulting and custom programming services to help you enhance the system to meet the unique needs of your organization. The company provides training or custom workshops designed specifically for your organization. As with other open source products on this list, there is a community to support and help you and you can contribute to the forums and company Wiki. Razuna is part of Six Signs, a startup working on several open source projects.