Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
Team Win Recovery Project (TWRP) - Custom recovery used for installing custom software on your device.
ActiveWords - Auto correct on steroids
Heimdall - Heimdall is a cross-platform open-source tool suite used to flash firmware (aka ROMs) onto Samsung...
Zeplin - Collaboration app for UI designers & frontend developers
ODIN - Odin can be used to flash a Custom Recovery firmware image to a Samsung Android device.