What does a typical Attitude and Orbit Control System (AOCS) look like for a very small satellite? How does such a satellite control its attitude and orbit? Are there any means of propulsion at this scale - like chemical or electrical thrusters or other AOCS related devices like torquers, reaction wheels or sun, earth and star sensors?
By very small I mean satellites like micro (10–100 kg), nano (1–10 kg), pico (0.1–1 kg) or femto (< 0.1 kg) satellites.
There exists a related older question about cube satellites and their propulsion systems. However, this question is different to the older one, since this question is related to AOCS (which is not identical to propulsion system) and explicitely asks for the specific cases of micro, nano, pico and femto satellites.