Masso 5.09 and ATC. Use at own risk

Spindles and ATCs PwnCNC ATC System
11

He also has has a mobile tool slide. Movable Tool Slide - #10 by Mrd

Here’s what Masso says about both of them.

Linear Tool Changer (Type 1)

Linear Tool Changer (Type 2)

Personally, I haven’t played with linear tool change 1