Redox OS is an ongoing, ambitious project that serves as a proof-of-concept for building a modern, memory-safe operating system from the ground up
Catalyst is a niche, independent web browser for Windows, developed by a single programmer, César Claudio Lóriga González. It has been in active development since around 2016.
The project was eventually abandoned, its website shut down, and it is now considered obsolete and unsafe to use. It is remembered as a charming but unsuccessful experiment in browser design.
Blue Hawk is a highly specialized, niche web browser focused on maximum security, now considered obsolete and unsafe
Polypane is a specialized, premium web browser built specifically for web developers and designers
NetSurf is a free, open-source web browser designed to be fast, lightweight, and highly standards-compliant, particularly for legacy and embedded systems