Extremely early version, with about one day of work done. This is the earliest available version found.

A version from before Acmlm's Board opened.
Barebones copy with many resources missing.

A later prerelease version with PM functionality and some minor optimizations.
Contains all the resources missing from 0.7.

The initial version used when Acmlm's Board opened.

A slight update to 1.0.

A minor update which improves performance a little bit.
This is the last version before the switch to MySQL.

Not the original, but a version customized for FFMusic.net.

First of the known distributable versions. This was lost for quite some time.

Recovered from the backup folder in 1.9.

A distributable forked from an earlier revision of 1.8.

Seemed to be used internally as a test copy with a 1.79 backup database?
It's a later version than the distributable.

The last development version used in the I1 archive.

Last "official" version; comes in both 'internal' and 'distributable' variations.