Cantor Online - mathematics and statistics software – rollApp.
Cantor is a front-end to powerful mathematics and statistics packages. This software integrates them into the KDE Platform and provides a nice, worksheet-based, graphical user interface. This is the best free tool for education. Cantor has a lot of features:
Support for four different environments (Maxima, R, SAGE, KAlgebra)
Possibility to retrieve and share worksheets through Get Hot New Stuff
Integration of the selected environment's help in the user interface
Work with Cantor online on rollApp with no download from your Chromebook and other devices via Dropbox, Google Drive, and other cloud storage.