It you're a student or teacher you can can apply for an Academic Research or Teaching license to access these tools. Please proceed to do so here:

OR No license needed for:
Chemicalize: We have a free website that showcases our calculation and predictor tools. Visit the and that's all. It is powered by ChemAxon calculations.
Download Marvin: If you want to have a desktop tool, especially useful if you work on a paper or thesis, then register here: (if you didn't do so yet); and simply download our Marvin tool. This is a chemical drawing tool, and it has a calculations menu item on the top. Without a license, you can use that - only for non-commercial purposes. No worries it will pop up an error message that you do not have a license for calculations, but if you hit the OK button, the calculation will run eventually...