8bitworkshop is described as 'browser-based IDE for Atari 2600 development built on Javatari and DASM and CodeMirror ' and is an website in the Development category. There are more than 10 alternatives to 8bitworkshop, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Self-Hosted solutions. The best alternative is TIC-80, which is both free and Open Source. Other great sites and apps similar to 8bitworkshop are PICO-8 (Paid), Voxatron (Paid), Bitsy (Free) and quadplay (Free, Open Source).
WASM-4 is a low-level fantasy game console for building small games with WebAssembly. Game cartridges (ROMs) are small, self-contained .wasm files that can be built with any programming language that compiles to WebAssembly.
VectorBoy is a fantasy console that can be used to play your own games written in the LUA scripting language. Unlike other systems of its kind, it doesn't use pixels to display graphics. Instead, the screen displays straight lines to form graphics of all kinds.
CHROMA-60 is a Fantasy Computer programmed in assembly language for an emulated 8-bit CPU and has a scanline based renderer that supports raster effects and allows for very colorful images despite the 1-bit display.
BASIC8 is an integrated Fantasy Computer. Create, share and play disks in a modern BASIC dialect. Use built-in tools like sprite, tile and map editor to develop games fast while having fun with retro aesthetics.
LowRes NX is a simulated retro game console which can be programmed in the classic BASIC language. Make your own retro games on a virtual game console. Create sprites, tile maps, sound and music with the included tools.
PQ93 is a fantasy console for making small games. It is available to download and run natively, but you can play the demo in-browser above. Included in PQ93 is a command shell and editors for code, sprites, sound effects, music patterns, and maps.