JMathEdit is described as «equation editor that helps editing complex mathematical expressions with ease» and is a LaTeX Editor in the education & reference category. There are more than 10 alternatives to JMathEdit for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Self-Hosted solutions. The best alternative is LibreOffice — Math, which is both free and Open Source. Other great apps like JMathEdit are MathType, TexMaths, EqualX and Apache OpenOffice Math.