JFractionLab helps to understand fractions
JFraction is a free program to practice doing fractions at school or at home. By visualising every step of the calculation, it really helps you to understand what fractions are.
JFractionLab is java-written FOSS to practice doing fractions. It is easy to use, and very practical in teaching and learning calculations with fractions. .
JFractionLab is available in English, German, French, Spanish, and Italian.