quickMockup - Online tool for creating mockups in the browser.
iOS Design Kit - The newest library of native iOS templates
POP (Prototyping on Paper) - POP helps you make interactive prototype with ease. If you can draw, you can design apps.
Phoenix Wright: Ace Attorney Trilogy - Phoenix Wright: Ace Attorney Trilogy is an Adventure-based, Puzzle and Single-player video game developed and published by Capcom.
Invision - Prototyping and collaboration for design teams
Velvet UI Kit - Cozy iOS UI Kit designed for Sketch 🌸