TagSpaces - TagSpaces is an open source platform for personal data management. With TagSpaces you can manage and organize the files on your laptop, tablet or smart phone.
Tagfs - tagfs is Fuse file system to organize your files using tags.
TMSU - TMSU is a tool for tagging your files.
Tabbles - Tabbles use tags to organize and find files along with your colleagues.
TAGXFS - Tagxfs is a semantic file system. It extends the user space file system to a tag based hierarchy.
TagFlow - TagFlow is an intelligent files manager that use tags for organize your documents.