The search for Motion Tools 2.1.2 specifically as a "free download" is complicated by the fact that the developer, Motion Design School, has transitioned the tool to a paid
Motion Tools 2.1.2 is a free, open-source extension for Adobe After Effects, developed by creative coder (now part of the aescripts + aeplugins ecosystem). Unlike many paid scripts that cost upwards of $50, Motion Tools offers a generous free tier that competes with premium animation plugins. Motion Tools 2.1.2 Free Download
This suite includes: