Nucleo - Commercial vector icons and accompanying apps to manage and customize them.
Gboard - Google-powered keyboard with search, GIFs, emojis and more!
Streamline icons - The world’s largest icon pack library - 100k icons and illustrations.
AnySoftKeyboard - Android (f/w 1.5+) on-screen keyboard for multiple languages.
Freepik - More than a million free vectors, PSD, photos and free icons. Exclusive freebies and all graphic resources that you need for your projects
Fleksy - Fleksy is the #1 private, white-label virtual keyboard SDK, enabling companies to create unimaginable products.