NexControl is a simple Perl program that controls a Celestron NexStar series telescope.
Nova is a free Integrated Observational Environment for astronomers. It combines ephemeris functionality with the capability to control telescopes and CCD cameras.
Qastrocam is a capture program that can work with any video4linux device. Its main purpose is to do astrophotography. It can control a telescope to do guiding with the images received from the video device.
Qastrocam-g2 is a modified webcam capture software for astronomy. This project is a fork from the great Qastrocam,
s4l is a SCOPE telescope stepper controller program.
Talon is a a fully automated open-source solution for automated telescope and observatory control. Talon controls all aspects of robotic astronomical observations, including telescope control, dome control, image processing, scheduled operations, and more.
Tiny Tim is a program which generates simulated Hubble Space Telescope point spread functions (PSFs). It is written in C and distributed as source code and runs on a wide variety of UNIX and VMS systems.
XmTel is a program for controlling Meade LX200 telescopes (tested on the 16-inch LX200) and Celestron NexStar GPS telescopes (tested on the 11-inch) under Linux.