(http://www.freepicsupload.com/pics/phpox0kzs-mp3rocketP2P.jpg)
MP3 Rocket looks a lot like LimeWire and works the same way, so it's another good option. It's a lot like FrostWire, too, though MP3 Rocket does offer you a pro version and screens will pop up from time to time asking you to upgrade.
During install, MP3 Rocket offers the Ask toolbar -- make sure to uncheck all the boxes if you don't want it. You'll also be asked for your email address, but you don't have to provide it -- just click next to skip ahead.
Download (http://sourceforge.net/projects/mp3rocket/files/mp3rocket/MP3%20Rocket%20v5.3.4/MP3Rocket-Win_v5.3.4.exe/download) MP3 Rocket for Windows