Best file sharing software you have used in the past

Speaking stricly in the past, what file sharing software did you prefer, especially when it come sto slowing down your ocmputer and connection or leaving viruses/spyware/trojans/etc on your computer?

I think the discussion of filesharing is frowned upon by TPTB, but while this thread survives…

I’ve used them all. I think WinMX was consistently reliable. Limewire was the worst. A colleague insisted on using it on a (non-networked) work PC and that PC would regularly get infested with shite very quickly.