I'd like to add to what johngabriel stated: now the only real free alternative is hotkeynet, and the development there - how excellent it may be - is frozen. Mojo was imo a very promising alternative that unfortunately never matured. If you know what an opensource tool like open broadcaster software did for the streaming market (and kicked xsplit its butt), I genuinely believe that 1 commercial software (isboxer) owning such a big chunk of the multiboxing market ain't a healthy situation. Any attempt to create competition should be applauded imo, even more when the source code is available.