NeuroGrid is an adaptive decentralized search system. NeuroGrid nodes support distributed search through semantic routing (forwarding of queries based on content), and a learning mechanism that dynamically adjusts meta-data describing the contents of nodes and the files that make up those contents. NeuroGrid is an open-source project, and prototype software has been made available at http://www.neurogrid.net/ NeuroGrid presents users with an alternative to hierarchical, folder-based file organization, and in the process offers an alternative approach to distributed search.