Overleaf - The online platform for scientific writing. Overleaf is free: start writing now with one click. No sign-up required. Great on your iPad.
doopoll - Create live, instant, editable polls effortlessly
TeXworks - The TeXworks project is an effort to build a simple TeX front-end program (working environment)...
Decisionize - Simplify decision making in 3 easy steps
Texmaker - Texmaker, free cross-platform latex editor
mombo - Better decisions, faster.