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• Find versions of GeoPaint and GeoWrite that are patched to support up to 4 drives! Only at Zimmers! Needs explanation on how to get the .CVT on a GEOS disk. NEW INFO: According to this, there are many 4-drive patched applications. They must be found! IN PROGRESS

• Get list of found projects sorted and categorized - Table is gone. List instead.

NOTE 1: The only info here is project name, URL, and short description
        from search results. Checking for duplicates, filtering, and sorting 
        will happen later.
NOTE 2: This list will hopefully become part of the renewed software section.

• chrisgleissner/c64bridge - MCP server to control and program the Commodore 64 Ultimate, Ultimate 64, Ultimate II, or VICE.
• xphileby/c64u-mcp-server - MCP (Model Context Protocol) server for the Commodore 64 Ultimate Computer.
• bbsbot/ultimate-64-dev - A library of Claude Code skills to empower the ultimate Commodore 64 developer for games, utilities, and more.

• robbiew/turbo64 - A modern Commodore 64 BBS written in C for the Oscar64 compiler. Optimized for VICE and the C64 Ultimate.
• nmclaren/c64u-term - Terminal software targeted primarily for the Commodore 64 Ultimate by Commodore International Inc. May or may not work on other devices.

• UBoot64-v2 - Boot manager/Boot menu for Ultimate devices.

• MykelSIlver/meshchat64 - End-to-end-encrypted WebSocket chat running entirely in 6502 assembly on a Commodore 64. A real C64 (or Ultimate-64) chats, fully encrypted, in the same network as modern browsers.

• Infinite Matter
• Ultiverzum
• The Tuneful Eight (included on The Very Second)
• UltimateDemo2026
• Raster Split Fun

• rericflores/c64uhex - C64UHEX is a native hex editor for the Commodore 64. It provides professional, byte-level inspection and modification of binary data using a true PETSCII interface, respecting the constraints and character semantics of the original platform.
• drericflores/AdveditC64 - Advanced Commodore Editor is a native, full-screen text editor designed specifically for the Commodore 64, with special attention given to the C64 Ultimate and its SD/USB-based storage workflow. The editor is inspired by the philosophy of the Linux nano editor: Simple controls, fast interaction, minimal cognitive overhead, and clear on-screen prompts while respecting the technical constraints and historical behavior of vintage hardware.

• qwertybob1978/Commodore64_8088_Ultimate_Emulator - PCem Inspired 8088 Emulator for the Commodore 64 Ultimate (in Turbo mode)

• 

  

  Ultimate Opus

  Ultimate Opus - A dual-pane file manager for Ultimate devices, released by Lft. Current version is 0.2, released in 2014. No active development.

• Axlfc/abadia-c64-starter - Test Port for Commodore 64 (Ultimate) of the game 'La Abadía del Crimen'

• Cenbe/geoIRC - IRC client for GEOS/GDOS64. Connect to any IRC channel available on the internet. Only works via Ethernet!
• xahmol/GeoUTools - Tools for use with Ultimate devices without having to leave the GUI, or even having to open the Ultimate menu! Also works in 80-column mode in GEOS128 with Ultimate cartridge.

• JKnivesworthy/hometo64 - A Home Assistant Integration to view and control your home directly from the Commodore 64 Ultimate.

• jbramwell/READYCode - A remote editor for the Commodore 64 Ultimate.

• kfox/c64cast - Turn a real Commodore 64 into a programmable display + audio device via Ultimate 64 or TeensyROM+ — video, SID-music scopes, webcam, MIDI/ASID synth, WLED, generative visuals, overlays, playlists.

• Heartbeat Sound Tracker - Heartbeat Soundtracker is currently the only music program that fully covers the sound capabilities of Commodore 64 Ultimate – all the 8 SIDs and 7 sampler channels.

• fputmango/Teletext64U - Teletext program showing live pages from the internet for the Commodore 64 Ultimate and other Ultimate products that have networking capabilities. Also supported: WiC64!
• k6lcm/c64u-radar - an ADS-B radar scope for the Commodore 64 Ultimate

• xlar54/uos-master - A new graphical OS made specifically to take advantage of the Ultimate 64's capabilities
• ReadyOS - What if a Commodore 64 could feel ready, not just nostalgic? ReadyOS treats waiting as the enemy. It is a keyboard-first, full-screen terminal-style environment built around instant app switching, suspend/resume, shared clipboard and history, and deeper links between apps.
• Command64 OS - MS-DOS style operating system for the C64 with a REU size of 1MB minimum

• danielwcarey/C64UltimateMouse - Sample code to use the Commodore 64 Ultimate Mouse

• xlar54/ultimateii-dos-lib - cc65 library for accessing the DOS and network functions of the Ultimate II+ cartridge the Ultimate 64 motherboard, and the new Commodore 64U
• omiq/c64-ultimate - Programming the C64 Ultimate
• c64uploader/go-ultimate - A Go library for remotely controlling Commodore 64 Ultimate
• monteslu/c64lua - Write Commodore 64 games in PICO-8-flavored Lua, compiled to native 6510. Autostart .d64 disks for the C64 Ultimate and demo scene.

• EdyJ/c64u-control-panel - Comprehensive web-based control panel and toolset for the Commodore 64 Ultimate (C64U)
• amiantos/c64-ultimate-toolbox - Native macOS app for streaming, viewing, and controlling your Commodore 64 Ultimate device with real-time CRT shader effects.
• chrisgleissner/c64commander - Cross-platform app (Android/iOS/web) for controlling a Commodore 64 Ultimate over your local network.
• sandlbn/Phosphor - A SID music player for USBSID-Pico hardware and Commodore Ultimate 64, supporting both hardware SID chips and emulated SID playback.
• svetzal/r64u - Cross-platform desktop app for controlling Commodore 64 Ultimate devices (Ultimate 64 / 1541 Ultimate II+) over the local network — browse files, mount disks, run programs, play SID music.
• coat64/C64-FTP-Upload-tool - A small, cross-platform GUI utility to upload files from a PC to a Commodore 64 Ultimate via FTP.
• lastylegp/Quopus - Quopus Commander started life as a familiar two-panel file manager and grew teeth: a workshop for everyone who still cares about Commodore, demoscene art, and the old serial / BBS protocols. If you spend time around a real Ultimate-64, VICE, a 1541, a modem callback, or a wall of .d64 images you forgot you had - this tool was built for you.

• cybersorcerer/c64u - CLI for the new Commodore C64 Ultimate
• jeffsand/c64 - Command your Commodore C64 Ultimate from the terminal. npm install -g @jeffsand/c64
• carledwards/u64shell - A DOS-style TUI that mirrors a Commodore 64 Ultimate's screen live and remote-controls it — in your terminal or a browser, from one codebase. Built on u64ctl + foxpro-go.

• chrisgleissner/c64stream - C64 Stream is an OBS Studio source plugin for streaming video and audio from Commodore 64 Ultimate devices
• gruetze-software/C64UViewer - A high-performance, lightweight remote video stream viewer for the Commodore 64 Ultimate and Ultimate-II+ ecosystem. Working on Windows and Linux.
• jusii/vlc-u64stream - VLC plugin that decodes the Ultimate 64 / Commodore 64 Ultimate raw video+audio UDP stream natively

• wiebow/d71-81writer.c64 - 1541 ultimate 2 write tool for D71 and D81 disk image files. Commodore 64 version.

(…but that still benefit from its features)

• SID-Wizard 1.97 - SID tracker for Commodore 64/128 as well as for Windows, MacOS, and Linux. Create music for up to 4 SID chips (real, or virtual). Includes a large instrument library, example tracks, MIDI, and a piano roll view.

• C64OS - C64OS is a versatile operating system for the Commodore 64 that provides a set of sophisticated tools in a powerful and unified user interface.

• GUI64 - A Windows/Mac looking GUI, utilizes Ultimate functions when used in an Ultimate device.

• GEOS – is included in “The Very Second” USB cassette that comes with the C64U. See also the ‘files’ section of the FB-group The Commodore 64 Ultimate Owners Group

• GDOS64 - A free GEOS-compatible operating system for the Commodore 64. Supports more hardware out of the box, like CMD devices, SD2IEC, 4 drives, and don't forget the facelift that the GUI has had!

* GoDot64 - GoDot64 is a comprehensive, can-do-it-all image manipulation suite with loaders and savers for a huge number of image formats (including PC and Mac formats), filters, and much more.

This list is not intended to be complete. Some SIDs can be purchased from a large number of stores. The purpose of this list is to provide a starting point. A smart shopper will compare prices and fees before purchase.

• SIDkick
• SIDkick Pico
• ARMSID
• ARM2SID
• FPGASID
• PDsid
• BackSID
• SwinSID
• SwinSID Nano
• SwinSID Ultimate
• X-SID
• Kung Fu SID
• reDIP-SID
• SIDMax
• SIDEmu

.
├── BBS
│   ├── CCGMS Ultimate
│   └── UltimateTerm
├── DEMOS
│   ├── 1337
│   ├── 20 Years Onslaught
│   ├── A.I. LOVE YOU
│   ├── Bad Apple 64
│   ├── Barry Boomer Trapped Again
│   ├── BluREU
│   ├── Comaland
│   ├── Coma Light 13
│   ├── Commodore Christmas Demo
│   ├── Concert
│   ├── Cosmail
│   ├── Cubic Dream
│   ├── Dawnfall
│   ├── Desert Dream
│   ├── E2IRA
│   ├── Edge of Disgrace
│   ├── Expand
│   ├── Flash XI
│   ├── Formula Petscii
│   ├── Incoherent Nightmare
│   ├── It's More Fun to Compute
│   ├── JustinBlue
│   ├── La Linea 85%
│   ├── Lunatico
│   ├── Marc's Movements
│   ├── Mathematica
│   ├── Memento Mori
│   ├── Mentallic
│   ├── Mojo
│   ├── Multiverse
│   ├── Neon
│   ├── Next Level
│   ├── Nightfall
│   ├── Nine
│   ├── Nothing but PETSCII
│   ├── Old Men in Used Cars
│   ├── One-Der
│   ├── Parallax Tribute
│   ├── Raster Split Fun
│   ├── Seal of Focalor
│   ├── Snapshot
│   ├── Soiled Legacy
│   ├── Soul on Fire
│   ├── The Last Truckstop 3
│   ├── The Shores of Reflection
│   ├── The Violators
│   ├── The X-File
│   ├── Tower Power 92%
│   ├── Ultiverzum
│   ├── Unboxed
│   ├── Unsound Minds
│   ├── What Is The Matrix 2
│   └── Wonderland XIV
├── EXCLUSIVE
│   ├── Commodore 64 SID Tribute
│   ├── GoatBeat - SID Legends I
│   ├── JollyDisk
│   └── Jupiter Lander II
├── GAMES
│   ├── NTSC & PAL
│   │   ├── Amaurote
│   │   ├── Aviator Arcade I+II
│   │   ├── Bomberland
│   │   ├── Bruce Lee - Return of Fury
│   │   ├── C64anabalt
│   │   ├── Green Felt Classics
│   │   ├── Hunchback
│   │   ├── Lester
│   │   ├── Lost Realms of Murkasada
│   │   ├── Lykia - The Lost Island
│   │   ├── Misfortune
│   │   ├── Outrage
│   │   ├── Redrunner - Greenrunner
│   │   ├── Rescuing Orc
│   │   ├── Robot Jet Action
│   │   ├── Spaceman Splorf
│   │   ├── Space Moguls
│   │   ├── Space Station 23
│   │   ├── Star Storm
│   │   ├── Super Bread Box
│   │   ├── The Adventure Series
│   │   ├── The Bear Essentials
│   │   ├── Tiger Claw
│   │   ├── Timo's Castle
│   │   ├── Tiny Harvest
│   │   ├── Wolfling
│   │   └── YOOMP! 64
│   └── PAL
│       ├── Acid Runner
│       ├── Balls like a Frog
│       ├── Fred's In Troubles
│       ├── Into Hinterland World
│       ├── Leilei Relay
│       ├── Lions of the Universe
│       ├── LuftrauserZ
│       ├── Metal Warrior 4
│       ├── Miecze Valdgira II
│       ├── Sceptre of Baghdad
│       ├── Scramble Infinity
│       ├── Shaman
│       └── Way Of The Exploding Fist
├── GEOS Boot Disk.d64
├── GEOS information.txt
├── GEOS Swap Disks
│   ├── GEOCalc.d64
│   ├── GEOFile.d64
│   ├── GEOGif.d64
│   ├── GEOPaint.d64
│   ├── GEOPublish-a.d64
│   ├── GEOPublish-b.d64
│   ├── GEOSDemo.d64
│   ├── GEOSDeskpackA.d64
│   ├── GEOSDeskpackB.d64
│   ├── GEOSFonts1.d64
│   ├── GEOSFonts2.d64
│   ├── GEOSFonts3.d64
│   ├── GEOSFonts4.d64
│   ├── GEOSpell.d64
│   ├── GEOWrite.d64
│   └── GEOWrite_REU.d81
├── GUI64 information.txt
├── GUI64 [NTSC].crt
├── GUI64 [PAL].crt
└── MUSIC
    ├── Bonzilloscope
    ├── C64 Grand Tour Challenge
    ├── CyberChip
    ├── Echofied 6581
    ├── MultiSID
    │   ├── 2SID
    │   ├── 3SID
    │   ├── 4SID
    │   ├── Machine Yearning
    │   └── The Tuneful Eight
    ├── Patto's Music Collection
    ├── SID Chip Club
    ├── Speed
    └── The Richard Joseph Tribute

232 directories, 653 files