I know that these two effects are huge in popularity, but I love these types of effects (particularly these two) and use them regularly.
The Ring Mod could be as simple as Mix & Frequency. A LFO and rate control would be nice too, but not as necessary. The Bitcrusher could be part of this same effect with a mix and amount of its own.
I thought I’d start a feature request in case others were interested too. Thanks.