Zeplin - Collaboration app for UI designers & frontend developers
Overleaf - The online platform for scientific writing. Overleaf is free: start writing now with one click. No sign-up required. Great on your iPad.
Abstract - A secure, version-controlled hub for your design files
TeXworks - The TeXworks project is an effort to build a simple TeX front-end program (working environment)...
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
Texmaker - Texmaker, free cross-platform latex editor