A+ TutorSoft, Inc has a FREE Interactive Math Software program available to download over at Currclick.  This Elementary Geometry software “introduces basic geometry and then slowly advances on to more complex geometric shapes. It teaches how to work with shapes normally taught in the upper elementary levels.”  This freebie, valued at over $21.98,  includes:

• Multimedia Lessons that teach MATH concepts using all three learning modalities (audio, computer animated visuals, and text). This makes learning MATH easy, fun, and engaging to increase understanding of concepts.
• Interactive Review helps students/parents identify and close learning gaps immediately as it automatically re-teaches concepts with audio, visuals and text.*
• Worksheets and exams provide extra practice to help master each core subject area.
• Solution Guides provide detailed step-by-step solution with visuals to each problem on worksheets and exams.
• Full text versions of lessons provide additional flexibility for those who like to read through the lessons.