There are 3 repositories under commodore-128 topic.
Sidekick64: A Versatile Software-Defined Cartridge for the C64, C128, C16, plus/4, and VIC20
TeensyROM is a ROM Emulator, Fast Loader, MIDI and Internet cartridge for Commodore64/128
Hardware design of Magic Desk compatible C64 cartridge up to 512k
GORILLA.BAS port to CP/M in Turbo Modula-2. Supported terminals: VT52, VT100, ANSI, ADM-31, KayPro, C128, Memotech monochrome, CPC / Zenith Z19
cc65 library for accessing the DOS and network functions of the Ultimate II+ cartridge and Ultimate 64 motherboard
Open Hardware Fast Loader cartridge for the Commodore 64 and 128
Eight Queen Puzzle - portable CP/M version, written on Commodore 128
Some routines to handle a C64 sprite multiplexer
Hardware design of Magic Desk compatible C64 cartridge up to 1024k
The retro-computing systems
C128 MMU 256K RAM expansion
Simple Console 6502/C64 Emulator written in C++ for Portability (ported from simple-emu-c64) ***AND see branches for embedded, LCD versions
Terminal 6502 Emulator with Commodore 64, 128, Vic-20, PET 2001, and TED: C16, Plus/4
D71 and D81 image writer tool for use with the 1541Ultimate 2 or 2+. Commodore 128 version.
Allow a modern USB keyboard to be used with a Commodore 128 in place of the original keyboard.
CIA-IDE hard disk drive interface for C64/128 for IDE drivers with GEOS and IDE64 drivers
The Innuh's pyramid: a multiplatform interactive fiction game
Server for hosting software via HTTP for use with Meatloaf. A Commodore 64/128/VIC20/+4 multi-device emulator.
Examples and tests for programming the Commodore 128 and its features.
Automatically set the GEOS clock from the onboard RTC of a 1541 Ultimate II/II+
BASIC , 6502 Assembly , Graphics , Sound ,Games for C64,
Adapter boards for the Commodore 128 to allow selecting a KERNAL using the RESTORE key.
USB adapter for the Commodore C1351 mouse.
Recreation and modernization of original 2D 1986 game for Commodore 128 by Ray Arias
A firmware patch for Commodore 1571 drive and internal C128D drive enabling RAM expansion use for track cache
The Servant for C128 patched for SD2IEC and 256K C128s
RamDrives drivers and auto-exec installer for GEOS 64/128 with RamCart 128K and/or internal 256K of RAM
Commodore 128 Keyboard polled scan codes to USB keyboard HID
Liste de commandes en Pascal pour le Commodore 128
RAM/ROM expansion for 1541-II that supports DolphinDOS 2 and patched JiffyDOS/SpeedDOS/CBM DOS to cache whole tracks in extra RAM
A daughterboard to expand C128/D/DCR color ram to 8 bits and/or to 32K OR expand internal 1571 RAM
Replacement for I/O space address decoder (U3 in C128) with extra features