Podolski is free and really quite an excellent instrument. I have been playing with it a lot and I am very impressed.
It has got some unusual oscillator sounds, the filter is cool and there are some great effects too. The step sequencer is also very interesting and can have different step numbers eg 9, 11, etc compared to the host program. Its arpeggiator is also excellent and fun to play
Overall it is fat and capable of very nice fat sounds, mono or poly and it has the classic Uhe sound and best of all it is free.