Table Generator is described as 'Entering tables in LaTeX documents can be burdensome because of the necessary formatting directives. For this purpose we created this online generator which (hopefully) will allow you to generate LaTeX code you can just copy & paste into your document's source'. There are five alternatives to Table Generator, not only websites but also apps for a variety of platforms, including Mac, Windows, Linux and Android. The best alternative is LyX, which is both free and Open Source. Other great sites and apps similar to Table Generator are Overleaf (Freemium, Open Source), KLatexFormula (Free, Open Source), VerbTeX LaTeX Editor (Freemium) and SwiftLaTeX (Free, Open Source).
LyX is a document processor that encourages an approach to writing based on the structure of your documents (WYSIWYM) and not simply their appearance (WYSIWYG). LyX combines the power and flexibility of TeX/LaTeX with the ease of use of a GUI.
VerbTeX is a free, collaborative LaTeX Editor. It allows you to create and manage LaTeX projects directly on your Android device and generate a PDF by using Verbosus (Online LaTeX and Octave Editor) "The Best Way to Type LaTeX on the Go" - androidappsreview.