Xils 3 LE, the lite version, is only serial protected, and its still a complete modular synthesizer, and can be used as a powerfull effect as well. Its price is more than affordable ( less than 30 € )
Xils-Lab flagship synthesizer Oxium is also only protected by a serial, as the PolyKB player, and all Xils analog effects. Then some Xils-Lab synths need a dongle, thats true. We would prefer not to have to do so, but, at least for Xils synths, the protection is efficient. So this also protects your investment, but we can understand that some people do not wish to use dongles.