Logo Foundry - Logo Foundry is a professional Logo Design Suite App for Android and iOS that let's you create professional branding for your business in Minutes.
Radix Icons - A crisp set of 15×15 icons. Open source.
Looka - Make a logo you’ll love with Looka Logo Maker.
Drawcon - Draw your own app icons
Canva Logo Maker - Create your own custom logos without having to hire a designer with Canva's impressively easy to use logo maker. Completely free, completely online.
App Icon Template - Royalty free app icon creator for iOS, OS X and Android