\(\LaTeX\) style checker by Alex Dainiak (Associate Professor at MIPT). Russian version is also available.

Guidelines on writing mathematical texts in general:

• Douglas B. West. Grammar according to West
• Paul R. Halmos. How to write mathematics

Learning \(\LaTeX\):

• \(\LaTeX\) tutorials on Overleaf
• Writing in proper high-level \(\LaTeX\): l2tabu
• Notes on advanced math typesetting: Wikibooks: LaTeX/Advanced Mathematics
• \(\LaTeX\) Tutorial for Beginners on YouTube: here
• Interactive MathJax/KaTeX based \(\LaTeX\) primer: here
• \(\LaTeX\) symbol lookup: Detexify and Write Math

\(\LaTeX\) linting:

• ChkTex \(\LaTeX\) source checker
• Textidote correction tool for \(\LaTeX\) documents

Various:

• Quick \(\LaTeX\) in-browser preview: LaTeX.js