Hunter Engineering® has one (if the not the best) reputation in the alignment Industry. Hunter® makes excellent equipment and has a very large service organization. Other well known alignment machine manufacturers (with a good reputation and a large service organization) are Snap-on® and John Bean® and Hofmann®.
Do you need a machine to do an alignment?
A car alignment is actually an elaborate process that brings the car's suspension into its proper configuration, positioning and adjusting components so that wheels are aligned with one another and the road surface. The alignment should be performed by an experienced mechanic, who uses an alignment machine.