Developer Tools Apps
Developer tools are where solo builders scratch their own itch most often, so this category is full of projects that started as a weekend fix and grew. You will find command-line utilities, editor extensions, API helpers and self-hostable services, each tagged with its stage so you can tell a rough prototype from a tool people rely on daily. Many are open source and looking for early users willing to file an issue. If you build for developers, this is the room where your first users already are.
Developer Tools ideas worth building
Micro-SaaS Plain-English accessibility checker for small-business websites Scan a site, get each accessibility issue explained in plain words with a fix, and track progress each month. Micro-SaaS Client-site uptime monitoring and reports for freelance web designers Monitor uptime, SSL and domain expiry for client sites on any platform, and send clients branded monthly reports.