A collection of small-ish 3D printers.

Enable dual-color, dual-material, and dual-part printing... with the same speed and quality as single-extruder printing. Mod a Voron Zero or build one fresh!
More info about Dueling Zero: https://github.com/zruncho3d/DuelingZero

A V0 mod to add Independent Dual Extrusion (IDEX). X0 for short. X0 adds a second printhead to a V0 to enable multi-color prints, multi-material prints, and even overhangs atop dissolvable supports.
More info about Double Dragon: https://github.com/zruncho3d/double-dragon

A V0 mod inspired by the Trident. Converts the bed from a single-leadscrew cantilevered mount to a three-leadscrew mount and enables automatic bed leveling with Klicky or SideSwipe.
More info about Crucible: https://github.com/zruncho3d/crucible

A V0 mod for a flying gantry. Uses quad gantry leveling, just like a Voron 2.4 or a Micron. (The main difference from the Micron is that the F-Zero is a V0 mod, and the Micron is a from-scratch build.)
More info about F-Zero: https://github.com/zruncho3d/f-zero

A Voron Zero mod to add Automatic Bed Leveling - under $100, in only a few hours. Provides the quality-of-life benefits of flying-gantry mods like F-Zero, but in a fraction of the build time, at much lower cost.
More info about Tri-Zero: https://github.com/zruncho3d/tri-zero

Almost a scratch build, but uses most of its parts from the Voron V0. With a custom triple belted Z and gantry, a whopping 142mm of X travel, 127mm of Y travel and 127mm of Z travel is available in a package only slightly taller than a stock V0.
Open Pandora's Box: https://github.com/zruncho3d/pandoras-box

Derived from Tri-Zero and Pandora's gantry with some nice QOL improvements. Increased rigidity in the flying bed, optional pinned bearing joints and honeycomb aesthetic (insert chefkiss)
More info about Hex-Zero: https://github.com/zruncho3d/hex-zero

A from-scratch build using 1515 extrusion like the V0, but with the design of a Voron 2.4 scaled down. Uses quad-gantry leveling, just like a Voron 2.4.
More info about Micron: https://github.com/hartk1213/Micron

A from-scratch build using 1515 extrusions like the V0, but with the design of a Trident scaled down. Uses a triple-leadscrew mount for the bed and enables automatic bed leveling with Klicky.
More info about Salad Fork: https://github.com/PrintersForAnts/Salad_Fork

A V0 scaled up to 2020 extrusions, with a slightly-larger 150mm³ (and unofficially 190mm³) build volume.
More info about Tiny-M: https://github.com/PrintersForAnts/Tiny-M

A Trident scaled down to same 150mm³ build volume as the bigger Salad Fork.
More info about Tiny-T: https://github.com/PrintersForAnts/Tiny-T
3D Printers for Ants: inspired by Voron Design, but neither endorsed by nor officially part of Voron Design.