Nebulosity is designed to be a powerful, but simple to use capture and processing application for Windows (7/8/10 32/64 bit) and OS X (10.7-14). A huge array of cameras are supported for capture (see below) and images from just about anything can be processed (support for many...This app doesn't have any features at the moment.
APT stands for "AstroPhotography Tool" and it is like Swiss army knife for your astro imaging sessions. No matter what you are imaging with - Canon EOS, Nikon, CCD or CMOS astro camera, APT has the right tool for planning, collimating, aligning, focusing, framing...This app doesn't have any features at the moment.
Qastrocam is a capture program to do astrophotography. It can control a telescope to do guiding with the images received from a V4L device. It can also control the extended features of a webcam modified to do long exposure (several seconds) captures.