A Virtual File System API, with backends for:

* SQL
* FTP
* Local filesystems
* Hybrid SQL and filesystem
* Samba
* SSH2/SFTP
* MongoDB
Reading, writing and listing of files are all supported.

This package is part of Horde, a web application Framework written in PHP with modules like IMP (webmail), Turba (contacts), Kronolith (calendar), Nag (task list), Gollem (file manager), etc.