ioBanana is a pretty old but still usable all-in-one plugin for ioFTPD 5.8.4u or 5.8.5r

It does many things, like .SFV checking, percentages directories to indicate completeness of uploads, etc.

This is where the actual source code of ioBanana is kept, and maintained.

The binary version is available for free on http://www.ioftpd.com/