Open PHD Guiding
The PHD (Push Here Dummy) Guiding software from Stark Labs is a popular, free package for telescope autoguiding on Mac and Windows. The goal of Open PHD Guiding is to bring PHD Guiding to Linux.
Version 1 kept the same GUI as the original Windows application. Currently, a version 2 is being developed as a major refactoring of the original application, including new GUI, internal structure, and improved Mac OS X compatibility. However, as can be seen here, this new version is not being tested with Linux during the heavy development and is not stable at all, even compilation fails.
Supported cameras sources: V4L2 and INDI. Webcams have been confirmed to work.
Supported mounts: INDI.