To be implemented sometime but not by me.
A Trip to the North
3D first-person hidden object game with free movement, set in Eastern Europe.
OutLoudOS
Operating system with no way of interacting with it other than by using a screen reader.
biggerfish
General purpose programming language that consists entirely of macros.
oldhub
Flatpak repository for outdated software.
seawall
Windowing system and UI toolkit that uses a bitmap tile grid instead of text or arbitrary graphics.
Prior art: 16 bit video game consoles
telemodem
Dial-up modem that sends data via a video stream.
Prior art:
vonman
Package manager for fonts, icons, images, and other non-executable files.
Abandoned ideas
B--
Programming language with no typing, no error checking, and the worst possible default algorithms.
Reason: C and Shell already exist.
Moment
Display server with the emphasis on modularity and a multi-level feature set.
Reason: No need for another Wayland.
Peppennaise
UI system that uses paper as a skeuomorphic metaphor.
Reason: Probably won't tanslate well to the digital domain, making it suffer the same fate as Material Design.
Peripheral Web Wiki
Wiki documenting lesser known websites.
Reason: Depending on the verbosity of the articles, it'd either be useless or unsustainable.
Photo Machine
Android camera app that lets you disable image processing and manually adjust everything.
Reason: Open Camera already exists.
amoebus
Toy WebAssembly OS-like environment to test alternative approaches to syscalls, sandboxing, and dynamic linking.
Reason: Too ambitious.
dexcribe
JavaScript web quiz framework.
Reason: Not another one.
humanoidOS
Toy operating system that only supports virtual hardware.
Reason: Too ambitious.
kaard
Android ID card app based on transfering signed JSON over NFC.
Reason: No actual government will adopt this.
lichfield
General purpose programming language where all functions are asynchronous.
Reason: Sonic Pi already exists.
memeruns
Speedrun website for cheated, fake, and non-game speedruns.
Reason: speedrun.com and tasvideos.org already exist.
shiplap
C video game engine for basic 2D pixel art games.
Reason: Not another one.
smethana
Discussion platform based on colontags and comment deduplication.
Reason: Useless.
smh
Wayland compositor where only 1 window is displayed at a time per output.
Reason: cage already exists.
steplane
Checklist app that shows only one step at a time.
Reason: One Task already exists.
waykeeper
Eyecandy Wayland screen locker.
Reason: waylock already exists.
waylandx
Wayland compositor allowing to run Wayland apps on X11.
Reason: No.
whinlucker
Wayland winlocker proof of concept.
Reason: Probably unimplementable in a way that won't be stupid.
wldj
Wayland configuration and debugging swiss army knife utility.
Reason: wlrctl and wlr-randr already exist.
xdj
xdg-desktop-portal swiss army knife utility.
Reason: ASHPD Demo already exists.
zalupa
Manual data compression language and format.
Reason: Can be done better with macros.