The hoo-hah surrounding the closure of Napster all those years ago now seems like a distant memory. At the time, users were literally crying that they would no longer be able to share files for nothing over the Internet. As it turned out, they needn't have worried because since then we've seen countless P2P clients come and go. Aside from being the world's first radio-enabled peer-to-peer software, FileCroc doesn't bring anything new to the table, however, it does combine a wealth of useful features with a smart GUI.
With shades of Ares about it, FileCroc works through a decentralised network with more than 50 million users, meaning that you invariably find what you're looking for and transfer times are pretty quick. It can even be used to download Torrent files, giving it extra bonus points in my book. Thanks to its drag-and-drop control method, it's dead easy to start sharing files with the program from the get-go.
Besides just giving you a platform to share files, FileCroc also includes a smart chat facility, with the ability to create your own rooms and host files within them. You also get a neat built-in player that lets you preview and play songs before they download. I've heard some grumblings before about an adware toolbar called 'Navelex,' which installs automatically with the client, but I found no sign of it in this version.
If you want a fully-featured P2P client with a fast search facility then FileCroc could be just the thing you're looking for.