IconPark
IconPark icon library is an open source icon library driven by technology vector icon style. It can transform a variety of themes according to a single SVG source file, with rich classification, lighter code and more flexible use scenarios. It is committed to building high-quality, unified and definable icon resources, so that most designers can choose their own style ICONS. It also supports exporting icon source files into component codes in various forms such as React, Vue2, Vue3 and SVG, so that developers can use them more efficiently
Ionicons
Ionicons is a completely open source set of 1,300 ICONS tailored for Web, iOS, Android and desktop applications. Ionicons are built for the Ionic framework, so the ICONS are available in both texture and iOS versions.
SVG Morpheus
SVG Morpheus supports morphing SVG ICONS from one to another. (This project is no longer maintained)
Feather
Feather is a collection of simple and beautiful open source ICONS. Each icon is designed in a 24×24 grid, emphasizing simplicity, consistency and flexibility.
Font Awesome
Font Awesome, the Internet’s most popular icon toolkit, has been redesigned and built from the ground up. In addition, there are official NPM packages for popular front-end libraries such as icon font hyphen, SVG framework, React, and the ability to access the new CDN.
Icons
Icons are the official open source SVG icon library for Bootstrap.
Iconfont
Iconfont is a vector icon management and communication platform made by MUX. Designers upload ICONS to Iconfont platform, users can customize and download ICONS in various formats, and the platform can also convert ICONS into fonts, which is easy for front-end engineers to adjust and call freely.
Material Palette
Material Palette: Allows you to choose from your Material Palette, icon, and color.
Google Material Deisgn Icons
Google Material Deisgn Icons provides free libraries of Icons that conform to the Material design specification, essential materials for UI design of Android applications.
IcoMoon
IcoMoon is an icon solution that provides three main services: vector icon packs, IcoMoon applications, and hosted ICONS in SVG or font form.
Super Tiny Icons
Super Tiny Icons below 1KB each! It’s a tiny SVG version of your favorite web site and application logo.
Zondicons
Zondicons a free set of advanced SVG ICONS for you to use on your digital products
Flat Icon Design
Flat Icon Design this website is a Japanese Icon website. The site is entirely in Japanese. There is no language switch, but it supports English search. Icon style for color flat wind, download can change the pattern size, color and background, support AI, EPS, JPEG, PNG, SVG format download.
Maki Icons
Maki Icons are sets of Icons designed for map designers. Maki includes ICONS of common attractions such as parks, museums and places of worship. Each icon can be used as SVG and is available in two sizes: 11px by 11px and 15px by 15px.
styled-icons
Styled – ICONS 💅 Popular icon packs, such as Font Awesome, Material Design and Octicons, can be used as React style components.
It provides over 20,000 ICONS from the following icon packs as styled components, fully supporting TypeScript types and tree-shaking/ES modules.
Heroicons
Heroicons is a set of free MIT-licensed, high-quality SVG ICONS for UI development.
My Icon
My Icon is a set of free ICONS to replace iOS 14 ICONS. There are thousands of ICONS to choose from, and customization and editing are possible.
Captain Icon
Captain Icon offers 350+ awesome free vector ICONS to enhance your mobile and web design capabilities
IconBeast
IconBeast is a collection of vector ICONS and symbols. ICONS are not only optimized for iOS app development, but can also be used for Android devices or any other type of Web development project. This is the ultimate package for over 3,000 iOS TAB bars and toolbar ICONS, designed and manufactured in a grid, ready to use and pixel perfect. You can also customize ICONS using vector files (EPS and AI) and the appropriate software (Adobe Illustrator, CorelDraw, or Inkscape), and you can resize vector graphics to any size. You are free to use ICONS modified for heart content: in apps, websites, 3D software, prints, banners, lists may continue to exist.
IconBeast offers PNG formats (three sizes: 30px by 30px, 60px by 60px, and 90px by 90px). Vector AI, Vector EPS, SVG, and PSD PNG also come in three colors: black, gray, and blue. In addition, you’ll have access to active ICONS and 500 completely free iOS Tab bar ICONS! IconBeast will provide you with more than forty icon sets with different profiles, such as for business and finance, maps and streets, software tools and interfaces, sports and leisure, human pictographs and more.
Invision App
Invision App is a free high quality UI suite, icon pack and model library
CSS Icon
CSS Icon SVG Sprite, style component, NPM and API provide open source CSS, SVG and Figma UI ICONS.
Ikonate
Ikonate is fully customizable and accessible with optimized vector ICONS.
Eva Icons
Eva Icons contain more than 480 beautifully made open source Icons for common operations and projects.
Icons8
Icons8 offers a range of free ICONS, illustrations, and more.
Animated Icons
Animated Icons is a free dynamic icon service from Icons8 that supports Lottie-based JSON, traditional GIFs, and After Effects formats that can be easily inserted into videos.
The Noun Project
The Noun Project offers more than 580 highly recognisable symbols for free. The Noun Project uses simple images and black and white to highlight an object, making it easy to identify its subject.
Flaticon
Flaticon provides more than 4 million free icon materials library, provides PNG, SVG, EPS, PSD and BASE 64 vector icon formats, can fully meet your UI design and web design projects.
Icon Ninja
Icon Ninja supports a free search engine for nearly 1 million Icon materials, all of which provide detailed information such as format, width, height, file size, etc. Ideal for front-end engineers and PPT designers. The format is PNG or SVG.
Unicons
Unicons open source vector icon and icon font library.
Iconfinder
Iconfinder is a free icon search engine with nearly 5 million icon databases, available in PNG, SVG and more formats.
Swifticons
Swifticons is an extraordinary library of ICONS. Provides 2680 advanced ICONS, 24 categories, and 6 styles.
Simple Icons
Simple Icons is a popular brand with over 1500 free SVG Icons. This is a small open source project started by Dan Leech at Gihub.
Free fonts
Free Fonts provides a series of font icon materials, including TTF, SVG, EOT, WOFF, OTF and other formats, currently more than 8 million fonts.
iOS Icon Gallery
IOS Icon Gallery focuses on iOS Icon design. Here you can find many excellent examples of iOS Icon design.
Iconsfeed
Iconsfeed is a professional iOS Icon library. Compared with the iOS Icon Gallery introduced above, Iconsfeed has more resources and clearer classification.
Find Icons
Find Icons is a free icon search engine with the largest icon library in the world. Search filtering and matching algorithms enable users to Find Icons for each design task, such as searching for a specific size, color, type, authorization, etc.
ICONSVG
ICONSVG is a tool especially needed by front-end designers to simplify the process of finding and generating common ICONS for projects.
Evericons
Evericons collects more than 460 carefully crafted ICONS for the next project, which are free to use and commercially available.
Visual Pharm
Visual Pharm offers a free library of super-fast searchable SVG ICONS, which seems to be the platform for Icons8.
Streamline Icons
Streamline Icons cover 53 categories, 720 sub-categories and have over 30,000 high-quality Icons to meet almost all your design needs
Iconmonstr
Iconmonstr is a free icon library of more than 4,000 simple lines. Maintained by a single creator and constantly updated, this largely ensures the quality of ICONS; Provide SVG, EPS, PSD, PNG and embedded source code and other formats to download, to meet the needs of designers and developers of various scenarios;
Tabler Icons
Tabler Icons provides a set of over 1250 free MIT-licensed high quality SVG Icons for use in your Web projects.
There’s another one that looks like it. I don’t know if it’s the same.
Tabler Icons offers 1262 fully customizable SVG Icons for free.
Twitter Emoji
Twitter Emoji is a simple library that provides standard Unicode Emoji support across all platforms. It follows the Unicode 13.0 specification and supports Emoji 13.0.