NOOOOOOO not limewire. It's a bloated piece of malware.
Now, what kinda file sharing are you talking about? Torrents? Gnutella? ED2K?
For torrents, uTorrent is the undisputed king. I personally used Shareaza which handles multiple protocols (torrents included), and it's also open source. Then there is this other OS file sharing program, I believe it was called Frostwire...
If you plan on trying Shareaza, make sure you download it from SourceForge website. The www.shareaza.com domain is a fake/scam, and the client they allow you to download is malware.
torrents are extremely popular nowadays. get a lightweight client like utorrent and find yourself a reliable torrent site with user reviews and feedback on what you are downloading.
lol i agree with coheen, here in about 10 20 minutes mep is going to come in here Wrahhhhhh!!! What are you talking about sharing media!??!?!?
just kidding mep
dont get mad
i always used limewire its the best one i can find, i dont think my power supply can handle my computer useing utorrent it puts my cpu at 100 % load for like 20 minutes then my comp shuts down