Aspen Plus - Maximize profits using a plant-wide simulation solution that combines unparalleled accuracy and engineering collaboration with time-saving workflows.

Survey Monkey - Create and publish online surveys in minutes, and view results graphically and in real time. SurveyMonkey provides free online questionnaire and survey software.

MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming

Typeform - Create beautiful, next-generation online forms with Typeform, the form & survey builder that makes asking questions easy & human on any device. Try it FREE!

SMath Studio - Tiny, powerful, free mathematical program with WYSIWYG editor and complete units of measurements support.

Google Forms - Simple web forms from Google.