Overleaf - The online platform for scientific writing. Overleaf is free: start writing now with one click. No sign-up required. Great on your iPad.
TeXnicCenter - TeXnicCenter is a feature rich and easy-to-use integrated environment for creating LaTeX documents...
TeXworks - The TeXworks project is an effort to build a simple TeX front-end program (working environment)...
Authorea - Collaborative platform for research. To write and manage technical documents in one place.
Texmaker - Texmaker, free cross-platform latex editor
LyX - LyX is a document processor.