Create tables made easy

This tools provides a great help when creating LaTeX tables from html, xls, etc formats and vice-versa. 

https://www.tablesgenerator.com/latex_tables

Convert latex equation to png

A nice web resource to convert latex equation to .png figures is latex2png

This is cool :) You don't know how ti write a LaTeX symbol, detextify it!

If you are looking for a symbol, but don't know how to LaTeX write it, you may use detexify:

http://detexify.kirelabs.org/classify.html