Every icon site claims to be "free." What actually matters for a commercial project is the license: can you use it in a paid product, do you need to credit anyone, and can the terms change after you've already shipped? These six libraries answer "no attribution needed" clearly in their own license pages, so you can build without a credits footer.
MIT licensed, so commercial use is explicitly covered with no credit required. Two weights (outline and solid), consistent 24px grid, available as SVG or React/Vue components.
A fork of Feather Icons with a much larger, still-growing set. ISC licensed — free for commercial use, no attribution. Ships as SVG, React, Vue, and Svelte packages.
MIT licensed. Useful when a design system needs thin, regular, bold, fill, and duotone variants of the same glyph without hunting for a matching set elsewhere.
MIT licensed. Deliberately minimal — around 280 icons — which keeps a UI visually consistent instead of mixing styles from a giant 10,000-icon pack.
Bigger than Feather or Heroicons while keeping one consistent stroke style. Good middle ground when you need broad coverage without switching to a paid set.
Hosts icons from multiple open-source sets in one search interface. Most are MIT or CC0, but because it's an aggregator, check the license shown on each individual icon page rather than assuming the whole site is uniform.
For fonts, color palettes, mockups, and 3D assets with the same free-vs-freemium clarity, see the full Toolyard directory.