# Collections

> Curated bundles of tools grouped by use case.

- [Developer Data Workflows](https://www.teafun.cyou/collections/dev-data-workflows/) — Format, inspect, convert, and validate payloads in the browser when you need a fast dev workflow without opening heavier tooling.
- [Everyday Planning Tools](https://www.teafun.cyou/collections/everyday-planning-tools/) — Use calculators and planning helpers for money, workload, studying, and daily decisions when a spreadsheet feels like overkill.
- [Gaming Performance Toolkit](https://www.teafun.cyou/collections/gaming-performance-toolkit/) — Measure and improve your gaming reflexes, click speed, and typing accuracy with free browser-based benchmarks that run locally with no sign-up.
- [Hardware & Peripheral Testing](https://www.teafun.cyou/collections/hardware-and-peripheral-testing/) — Verify your mouse, keyboard, gamepad, and monitor are performing as expected with free browser tools that test hardware locally without any drivers.
- [Design & Color Tools](https://www.teafun.cyou/collections/design-and-color-tools/) — Check color contrast ratios for WCAG compliance, simulate color blindness, and calculate aspect ratios — free design helpers that run entirely in your browser.
- [Arcade & Brain Games](https://www.teafun.cyou/collections/arcade-and-brain-games/) — Play free browser-based arcade games and brain-training puzzles with daily challenges, score tracking, and instant play — no downloads or accounts needed.