Chemical Formula Tutor v1.3 Makes learning formula writing easy, at home or in class. Chemistry Teachers and Students will appreciate the intuitive, interactive Drag-and-Drop interface. Helpful tips and cursors, built-in Atom Counter, Learn Mode,...

ChemCalcs provides a unique and intuitive system for mastering fundamental skills and processes essential to theunderstanding of chemistry calculations and concepts. The unique standardised interface system allows students to solve top roblems

See 2500 stars, all 88 constellations, planets and the moonphase from 1600 AD to 9999 AD from any location on earth. Print todays night sky ! Nice visuals, smooth animation, simple controls, good planet data too.