| SCL3300 | A library for SPI communication with the Murata SCL3300 Inclinometer sensor. |
| SiderealObjects | A library for providing basic astronomy related object tables. |
| SiderealPlanets | A library for providing basic astronomy related functions. |
| WMM_Tinier | An adaptation of the miniwinwm/WMM_Tiny code for calculating magnetic variation. |