Sun-Synchronous orbits. Earth observing satellites like them, they're good when launched from high altitude, and a lot of the newspace smallsat market is in earth-obs with modern optics and processing.

A sun-sync orbit keeps the satellite in the sun (out of Earth's shadow) and typically peels a whole pass of the planet every few days, IIRC.

(also Polar orbits, but there are fewer of those)