Coincidentally that site you just linked also hosts one of the longest-running Hotline servers still online: https://preterhuman.net/server.php / https://preterhuman.net/gethotlinekdx.php :)

(server address is hl.preterhuman.net )

Amazing. Interesting file names on hl.preterhuman.net. Wow, Java games for Nokia phones! This is so cool. Thank you

Cheers!! Yeah, this server has been collecting stuff for a very long time, and people have contributed lots of neat stuff. I'm not sure how many other servers have such a historical selection of files, probably not many!

Could it have been BeShare?

Just checked it out, looks cool, but don’t remember using it

Does it work on top of Hotline as well?

Do you know if there is a current version for Mac? Would love to try it out

The main client is only for Haiku, but there is an old windows client that can probably be run in wine. It uses a protocol called MUSCLE.

http://www.raasu.org/tools/windows/download.php