| Mats Carlsson | MULTI version 2.2 |
| Tiago Pereira, Han Uitenbroek | RH 1.5D code - download (RH stands for Rybicki and Hummer) |
| RH 1.5D code - documentation | |
| RH 1.5D code - related article | |
| Various authors | Spectropolarimetry inversion codes HaZeL, Nicole, SIR, etc. |