Four layers: Base, Upper (△), Right (▷), Upper Right (△ + ▷). Base layer similar to default Corne layout when Spanish OS is set (except RShift instead of Esc, LAlt instead of AltGr). Upper layer (△) aligns right hand with arrow keys. Right layer (▷) enables right-hand numpad. Missing keys: interpunct (·), Scroll Lock, Num Lock.

My smallest OLKB based on ARTSEY-mod-Colemak with a few changes.

This keymap use the default one with some changes to suit my needs. Mainly having most used symbol on a separated layer copying the common symbols from the number keys to the second row, adding other symbols and ◌̀ ◌́ dead keys for accents.

• JIS layout.
• Independent Windows layout/MacOS layout layers.
• Bottom row keys are arranged like a standard keyboard.
• Arrow keys are designed in the inverted-T.

My Kyria keymap and userspace. Includes Modular Bongocat and Conway's Game of Life

A simple straight forward layout, and good for programming. It is a bit configurable.

• Customized comma and period, which have exclamation point and question mark on their shift layer.
• Tap right-shift for underscore, tap left-shift for tab.
• Symmetric layout of paired braces/brackets/slashes for easier memorization.
• Arrows placed directly on home position

4 layer Kyria layout combo heavy. Macros for (),[],{},<>,**, HomeshiftEnd. Macro for the first 3 pastes in Clipboard History. 2 Encoders with custom triggers per rotation. Modmorph Delete(shift:Backspace), Custom HoldTap ms for Win+L on right encoder. Hold/tap on num layer for F keys.

Beginner-friendly Kyria keymap containing 5 layers which allows it to include all keys found on an ANSI layout TKL keyboard plus media keys. Hardware features of the Kyria such as OLEDs, rotary encoders and underglow are also supported.

Keymap for the Corne keyboard, optimised for writing (La)TeX and C files.

Loosely based on Miryoku, optimized for OS-independent legal writing on mac and windows.

A compact but full-featured and intuitive layout for programming and prose with chording for frequent words

This Tormentor keymap was designed for my workplace/hands/fingers aaand for Hungarian (+9 vowels). It probably won't fit with your needs, but the concepts and workflow might help your own project.

Keymap designed to balance French and English typing efficiency. Thumb-operated sticky, tap-dance and hold-tap layers provide quick access to accents, shortcuts, callum-style mods, and media controls. See write up link for more info.