Official open-source SVG icons from the Bootstrap project, usable with or without the CSS framework.
Maker: BootstrapVisit site
Solid / filled
Solid / filled listings in Icons, curated by UI Things.
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Microsoft Fluent product icons shipping regular, filled, light, and color variants for cross-platform product apps.
Maker: MicrosoftVisit site
Free tier of Font Awesome with solid, regular, and brand icons; Pro unlocks more styles.
Maker: Fonticons, Inc.Visit site
MIT-licensed UI icons from Tailwind Labs in outline and solid styles across three size tiers.
Maker: Tailwind LabsVisit site
Free outline icon library with solid variants, adjustable stroke, and packages for web and mobile.
Maker: IconoirVisit site
Hand crafted open icons from the Ionic team for web, iOS, Android, and desktop app projects.
Maker: IonicVisit site
Google Material Symbols variable icon font with fill, weight, and grade axes for flexible UI.
Maker: GoogleVisit site
Soft rounded open source icons with matching line and fill styles on a fixed 24px grid.
Maker: MingCute DesignVisit site
Premium multi family SVG icon system with apps, React packages, and free starter icon collections.
Maker: NucleoVisit site
Flexible MIT icon family drawn across six weights, plus fill and duotone styles for UI.
Maker: Phosphor IconsVisit site
Large free outline icon set with filled variants designed on a consistent 24px pixel grid.
Maker: TablerVisit site