Apps similar to VectorBoy include TIC-80, which is free and open source. Other options are Mini Micro, Pyxel, PICO-8 and Pixel Vision 8. You can choose from more than 10 Game Development Tools like VectorBoy for Windows, Linux, Mac, the web and self-hosting.
Picotron is a Fantasy Workstation: a self-contained creative environment built for imaginary hardware. Create cute Lua apps that can be run inside Picotron as windowed userland processes, shared as cartridge files, or exported to stand-alone HTML apps.
New Zealand
8bitworkshop is a browser-based IDE for Atari 2600 development built on Javatari and DASM and CodeMirror .
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.
Voxatron is a fantasy console system where games are made out of voxels and made available to the system as traditional cartridges that can be made from scratch through a built-in designer or remixed from other shared creations.
New Zealand
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.
Riko4 is a Fantasy Console intended as a tool for pixel art game development. Built with Lua and SDL2.
ECoS is a modern fantasy console based around the solid foundation of an Entity-Component-System architecture (ECS). Once learned, the use of an ECS can make game development and prototyping much faster and keep your code much more modular, making it easy to reuse, alter and...
ZANY80 is a fantasy console built around the Zilog Z80 processor (used in the classic Spectrum Z80 computer).
United Kingdom
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.
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.
