TexitEasy - TexitEasy is a free, cross-platform and open-source latex editor.
MathCrunch - Learn math stress free
latex4technics - Online LaTeX editor with autocompletion, highlighting and 400 math symbols.
MathPapa - Solves Algebra problems for you step-by-step
Lagrida Latexeditor - Lagrida Latexeditor is an all-in-one website that lets you edit, write or check the authentication of your mathematical equations or symbols in a decent manner without any hassle.
Shiny Things - Perfect for students to improve their math abilities