mldonkey for ed2k/kad network and bittorrent

I use duckduckgo. It is Bing but with more privacy. You could try also searx, swisscows, startpage or qwant

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)