Tor bridge/Snowflake , i2pd to help circumvent censorship on some countries

Tor bridge/snowflake, i2pd, syncthing relay, ipfs, pihole, wireguard…

Seedbox, tor bridge, i2pd node, pihole, wireguard…there are a lot of things you can run.

mldonkey for ed2k/kad network and bittorrent

You still have realvnc lite. It is free, 1 user, 3 machines, less features, but the basics still there.

Well you could run these services in your server (only if you have enough spare bandwidth, ram and cpu) to help the comunity to circumvent censorship in some countries, like Russia or Iran. Here you have more information for tor and i2pd.

Tor relay (guard/middle or bridge/snowflake) and i2p node (i2p, i2p+ or i2pd)

Tor bridge/relay and i2p node

Snowflake and i2pd could work but not in the best conditions.

A tor guard/middle relay or bridge/snowflake and i2pd node.

I recommend debian 12 works like charm

If they do not want to maintain and update a pihole, it is better to just use public dns, like adguard.