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Icon Horse fetches favicons for any website from a single URL usable in an img tag. It offers sensible fallbacks when no icon exists and caches icons for speed. A free Hobby plan allows up to 1,000 icons per month without an account.
ColorHexa is a free color tool that provides information about any color and generates matching color palettes, such as complementary, analogous, triadic, tetradic and monochromatic schemes. Users enter a color value and it offers a detailed description and converts it to equivalent formats including Hexadecimal, RGB, CMYK, HSL, HSV and CIE-LAB.
react-spring is an animation library for React that uses spring physics rather than duration and curve parameters. It supports fluid UI and interaction animations, SSR, and runs animations without re-rendering via an imperative API.
FilterBlend is a playground for the new CSS background-blend-mode and filter properties. The preview area can be dragged to change position, the mouse wheel changes size, and clicking switches the current background layer.
WhatUnit is a tool that helps users decide which CSS length unit to use. It presents a flowchart that can be panned by clicking and dragging and zoomed with ctrl/cmd plus mouse wheel.
Can I Email? provides support tables for HTML and CSS features in email clients. The site lists features and tracks support across clients such as Apple Mail, Gmail, Outlook, Yahoo! Mail and others, and includes a client scoreboard.
