Mipscript is a simple language that can be compiled down to MIPS assembly code. The ultimate vision is to make learning assembly code more easy for beginners. Development is still a work in progress.
The ASM code generated could be run in an environment like MARS where it can be modified and examined.
microsoft/monaco-editor - Used for code editing in the online playgroundLicensed under the AGPL-3.0 License. Modifications should be open-source and publicly available.