I've added a number of new Microlite20 supplements and variants to the download area of the RetroRoleplaying web site. Some of these are brand new, others are updates of older files. Three new Microlite20 "5e" variants are included. Both the downloads and the games are free.
Added: In case you can't figure out how to download files, the links below take you to a file description page where you can see what the file is about. To actually download the file, you then have to click on the file name (just under the blue download name bar and just above the Filesize/Views/Downloads/etc. line -- the file name you need to click on has a file extension --usually .pdf).