BitWise

BitWise is not other instant messaging program, because it offers advanced features to transfer files with your contacts.

You only have to register in the official site and add your friends to your contact list and you will be able to use the advanced features which are offered by Bitwise.

It offers several features, such as, voice conversations, multiconference, upload and download files, website history, icons, lots of skins,...

BitWise will share your files only with those users you want, because your privacy is a priority for Bitwise it even includes an encryption tool if you want to ensure your data.

And all this is totally free!