Learn LaTeX in 30 minutes - The guide does not require you to have any prior knowledge of LaTeX, but by the time you are finished, you will have written your first LaTeX document, and hopefully will have a good knowledge of some of the basic functions provided by LaTeX.

LaTeX symbols handwrite recognition - Just draw the symbol you want and the website gives the correct code and mentions the necessary packages to have it in LaTeX.

Excel2latex - Excel add-in to easily convert Excel tables to LaTeX code. Booktabs package installation needed.