Having access to icons that you can use for your projects can be a little hard at times. You can use the website listed below to help you with your search and find the icons that best suits you for your next design project.
the Noun project has a vast collection of icons that you can use for your projects. You can use their add-ins with Adobe and Microsoft software, as well as with other apps. Free and Pro version available.
Animated icon gifs that save you a lot of space if you are a web designer who wants to implement some motion into your work. Some of the animations are free but some require a small payment.
One of the well-known places where you can get icons for your projects. Font Awesome offers free and pro versions, but the free plan should be enough for most designers as it has over 1500 icons.