Overleaf - The online platform for scientific writing. Overleaf is free: start writing now with one click. No sign-up required. Great on your iPad.
QuillBot - Quillbot is a free paraphrasing tool that will rewrite any sentence or paraphraph you give it. The article rewriter can rewrite essays or articles and is excellent as a grammar and fluency corrector.
TeXworks - The TeXworks project is an effort to build a simple TeX front-end program (working environment)...
Typeset - Typeset helps you write and submit better research papers. Collection of 40,000+ journal templates. Choose your template, write content and download in PDF, Word and LaTeX within seconds ok
Texmaker - Texmaker, free cross-platform latex editor
Turnitin - Turnitin is preferred by educational institutions around the world for preventing plagiarism. Instructors at all levels of education can request that students use the service to submit papers, and Turnitin checks those papers for plagiarism.