The best supported clients are Titanium then probably Underfoot. Many people prefer UF due to the fact that it uses the newer HP formula and has more features (xtarget, etc) (note: if you find a 'HoT' client its actually just UF with the extra zone files from HoT)
The rest of the clients work well enough to be playable, but not as well as tit or if.
If you're setting up a single player only server and your own login server you don't need to make an account, although unless you do some port forwarding, no friends will be able to play with you (well you need to don't that anyways ...)
You should also try to use the new wiki since the old one has been in read only mode for a while and info can be out of date (although, the new wiki might not have been updated yet either .... Documenting is hard :PW well busy work)
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