Icons8 is a piece of software that allows you to insert icons into your app?s user interface. Icons8 has an extensive library of pre-created icons for you to choose from. This software is free and easy to use. Downloading and installing is very simple. The software lets you search by tags, and it only takes two seconds to search an icon and add it to your work. Icons8 has different sizes that you can choose from, which are 25x25 to 512x512. The software works with Windows, Android and iOS7. It has a number of different formats. All the vector icons are not included within the software, but they are available for download for a fee.