Cableguys are working on a new plugin with the name MidiShaper. Now they´ve updatet the plugin, that is still an beta version, but you can try the prerelease version for free. The latest version is 1.0b2.
“MidiShaper lets you draw waveforms for its 4 LFOs, and lets you use envelopes, to send pitch, modwheel, aftertouch or MIDI CC data. Thus you can port the flexibility from our synthesizer Curve to any other plugin, you can control any parameter of other synths or effects – if they (or your host) supports MIDI automation.”
More info here: http://www.cableguys.de/midi-shaper.html