github.com/donomii/vort-ftprelay (go): An experimental FTP server framework. By providing a simple driver class that responds to a handful of methods you can have a complete FTP server.  Some sample use cases include persisting data to an Amazon S3 bucket, a relational database, redis or memory.  There is a sample in-memory driver available - see the documentation for the graval-mem package or the graval READEME for more details.
Keywords: compression|content-addressed-storage|encryption|filesystem|ftp|ftp-server