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UnoDOS III 3.1 Wolf - A free operating system written in Z80 assembly language
PlusD Clone for all ZX Spectrum computers, based on the designs by @Pachuquin & @alvaroalea.
Organize and manage your emulator files for ZX Spectrum, ZX81, ZX80 & Lambda 8300 - powered by the web
Command-line cross-compiler of assembly language for Z80 CPU.
Portable ZX-Spectrum emulator supports Z80 128K (Pentagon) AY/YM, Beeper, Beta Disk, Tape, Kempston Joystick/Mouse, Snapshots, Replays.
Maker of MGT disk images for ZX Spectrum GDOS, G+DOS and Beta DOS.
Unofficial spotify plugin for Kodi
"rsync for cloud storage" - Google Drive, S3, Dropbox, Backblaze B2, One Drive, Swift, Hubic, Wasabi, Google Cloud Storage, Azure Blob, Azure Files, Yandex Files
A sample project that exists for PyPUG's "Tutorial on Packaging and Distributing Projects"
Clone of the Beta 128 Disk Interface for ZX Spectrum
Firmware to allow functional testing of ZX Spectrum hardware and related clones. See the wiki for full details.
Barebones API for zxdb - intended for use on the zx spectrum next
Send and recieve http requests into banks - for the Spectrum Next
Search and download files from the ZXDB Spectrum database using your ZX Next.
Classic ZX Spectrum game "The Great Escape" reverse engineered
JETPAC: fully annotated source code of this classic 8-bit game (1983, ZX Spectrum)
Z80N Forth system suitable to run on the new ZX Spectrum Next
Gerton Lunter's Z80 Spectrum Emulator for DOS