Here some of the free icons we can use in any library for our next projects and do wish to credit the creator.
1. Hero Icons - Visit
Beautiful hand-crafted SVG icons, by the makers of Tailwind CSS. Simple to use.
2. Flaticon - Visit
The largest database of free icons available in PNG, SVG, EPS, PSD, and BASE 64 formats. More variants so more to choose from.
3. The Noun Project - Visit
The World’s Most Diverse and Extensive Icon Collection. Over 3 million unique and simple icons.
4. TablerIcons - Visit
Open source, fully customizable 1000+ icons.
5. Icons8 - Visit
The modern, unique set of icons in both SVG and png formats. Available in various styles.
These are the various icon sets that I came across, feel free to add your favorite and go-to icons library in the comments below.
Note: Go through the website to learn about free licensing on illustrations that you use.