I have now made it so that you can publish libraries through this website! Libraries must be hosted on Github, and you need to create a special uecide.json file in the repo (details in the WiKi). Then your libraries will be automatically packaged up and made available in the Plugin Manager!
Running this server costs money. This server not only hosts this website, but is also the main build platform for creating the download files for UECIDE. Just a couple of pounds (or Dollars, Yen, Mongolian tögrög... we're not fussy) can help to offset the costs.