I wanted my users to see the quota on my FTP server on frontend login. I couldn't find such a plugin, so I wrote it myself. It consists of two parts: wogri_ftpquota, which is a service, that hooks into the typo3 authentication mechanism, and gets launched during login. This is because I don't store my frontend user passwords in the local typo3 database, but in a ldap tree (I authenticate using ldap_auth). The second part visualizes the results of the authentication service.

The bad thing is: If you can't read php code, you won't be able to "configure" my extension. It's not userfriendly at all, and you need to read my helpful comments in the sourcecode. Won't take you longer than 5 minutes, the service part is very short.

If you have problems using it (or if you succeed using it), let me know!

My FTP Server that supports quotas: Proftpd with mod_quotatab though might work with other ftp servers that support quota display. It supports SSL encryption upon ftp login, and unfortunately requires php5 to operate.