libjpeg-turbo - libjpeg-turbo is a derivative of libjpeg that uses SIMD instructions (MMX, SSE2, NEON) to...
AppLaunchpad - Create free beautiful screenshots for App store/Google play
libpng - libpng is the official Portable Network Graphics (PNG) reference library (originally called pnglib).
iOS Jetpack - Beautiful easy-to-use screenshot templates for App Store
mozjpeg - Mozilla JPEG Encoder Project
Smartmockups - Create stunning product mockups, easily and online.