Things that I want to be made or can't find

• Engine idle noise analyser (detect engine type, knocks, issues, AI-powered) User would place a phone on a car, press a button to analyze, and get info on the engine, problems, recommendations.
• Lightweight web office suite (minimal JS, under 1 megabyte per app)
• Lightweight email service (like gmail basic html, but not Google), or small Tutanota/Protonmail frontend
• OSS clone of https://pingendo.com/ - which generates sites with no JS
• Powerful linux USB media/formatting tool (like Rufus)
• Bloat free version of https://bubble.io/
• Another jelly physics game - there seems to be demand
• Alternative make implementation in Rust with better performance and debug tools
• Modern Sony camera firmware hack/exploit