Development tools are for people who write code, spanning low-level libraries through everyday utilities: libraries and frameworks, code editors, database management and database systems, languages and runtimes, code-quality tools, cross-platform app frameworks, reverse-engineering tools, and the AI coding assistants that have multiplied over the past two years.
Libraries and frameworks are the easiest to mistake for software you can simply download. They have no interface of their own and exist to be called by other programs, so with those the documentation, dependencies and version compatibility are what matter, not the installer.
For something you can install on your own machine, look at Code Editors, Database Management and Command-Line Tools. To cut repetitive work, look at Code-Quality Tools and AI Coding Assistants. To build a cross-platform desktop app, look at Cross-Platform App Frameworks. Reverse-engineering entries touch sensitive ground, so check local regulations and the software licence before use.