I really like the idea of rigor module and want it to be of more use outside of it's home planet, so i compiled a list of recipes that i encountered where it can be of benefit. Would be awesome if you decide to implement more compatibility with them.
Vanilla:
- Yumako processing
- Jellynut processing
- Iron bacteria
- Copper bacteria
Apia-Carnova:
- Fossil crushing
- Advanced bone processing
- Bone meal sieving
Arig:
- Sand sifting
- Advanced sand sifting
- Lithium brine sifting
- Cactus wood
- Cactus wood compression
Hyarion:
- Metallic ore smelting
Pelagos:
- Coconut processing
- Fermentation bacteria
- Titanium dust
Secretas&Frozeta:
- Golden science pack (not sure how good of an idea would be to add, but it's not exactly a balanced mod anyway)
Also, i think Maraxis has recipe for processing stone into uranium that is chance based, but i am not sure, don't have it installed currently.