FontMeter labels every text style on any page and shows the fonts that really render, the type scale and contrast. Inspect spacing, measure and pick colors without opening DevTools. Free, runs locally, and you can try every tool on fontmeter.dev first.
AboutNumber.com turns any integer into a complete mathematical profile. Enter a number and instantly see whether it's prime, its divisors and factors, binary/hex/Morse encodings, Fibonacci and Armstrong status, palindrome and perfect-number checks, and more — all on one page with clear explanations and visualizations. Enter two numbers to compare them as a pair. No signup, no ads, just answers — built for students, researchers, and the number-curious.
BYOK List is the ultimate directory of AI tools that let you bring your own API keys. Explore platforms for chatbots, automation, content creation, voice, productivity, security, custom models, and more - while keeping full control over your budget, data, and integrations. Compare tools by category, provider, or model support. Discover new BYOK-friendly apps and submit your own to help grow the list.
