DIY Loom Reference

3D printable stuff:

Tabletop Weaving Loom Mk I

"This small, tabletop 2-heddle weaving loom is a project that I have been working on for many months now, and I've decided to share it with the world, because I think that the machine is a really cool thing that everyone interested should have access to. This tool has an effective weaving width of about 123mm and can make about 1 meter worth of fabric."

https://www.printables.com/model/1600383-tabletop-weaving-loom-mk-i

Tablet weaving card

There are tons of tablet weaving models on both thingiverse.com and printables.com

https://www.printables.com/model/1417093-tablet-weaving-card

Warp-Weighted Tablet-Weaving Loom V2

This is just a system for tensioned warp holding on a table. Can be accomplished many ways, but this has a printed pawl/ratchet mechanism.

https://www.printables.com/model/1613756-warp-weighted-tablet-weaving-loom-v2

Easy-Peasy Knitting Loom

Jig for making beanies and "bed socks."

https://www.thingiverse.com/thing:7108104

Other Rigid Heddle Looms

Thingiverse.com has many more rigid heddle designs. Some scrutiny is needed to figure out pro/cons of various designs: https://www.thingiverse.com/search?q=rigid+heddle+loom&page=1

Hybrid (printed + otherwise) DIY Plans

DF Loom: A Simple and Flexible Rigid Heddle Loom

"Rigid heddle loom with customizable width and reeds count. Combination of 3D printed parts and aluminum profiles."

Non 3D printed plans

There are sure to be many wood plans, plans that use laser cut pieces, and plans using other hardware store type supplies such as PVC, EMT tubing, etc. Instructables has a few.