S3QL is a file system that stores all its data online. It supports Amazon S3, Google Storage, and OpenStack and effectively provides you with a hard disk of dynamic, infinite capacity that can be accessed from any computer with Internet access. S3QL provides a standard, full featured Unix file system that is conceptually indistinguishable from any local file system. Additional features include compression, encryption, data de-duplication, immutable trees, and snapshotting, which make it especially suitable for online backup and archiving. The design favors simplicity and elegance over performance and feature-creep. Care has been taken to make the source code as readable and serviceable as possible. Solid error detection, error handling, and extensive automated test cases are provided.
Collectfs is an easy-to-use FUSE userspace filesystem that provides add-on trash collection for any Linux directory hierarchy. Any file that is overwritten by removal (unlinking), moving, linking, symlinking, or open-truncation is relocated to a trash directory (mount-point/.trash/). Removed files are date-time stamped so that edit history is maintained. (A version number is appended if the same file is collected more than once in the same second).