TYPES OF MODULES
EDITORS AND CONVERTERSHTTP/FTP SITES WITH SAMPLES
OTHER MOD SERVICES
Most of the ftp servers you can download mods from will accept uploads too.
These usually go in an /incoming directory somewhere. Be sure to upload a text file with a short description (similar to part zero in section 7.1) along with the mod. Also remember to specify 'bin' for binary transfer, or your mod might be transmitted as a 7-bit file, thereby completely corrupting it. Making an announcement in a.b.s.mods about your upload will most probably be welcome.
See the section [6.1] FTP for lists of FTP servers.