Technology

Open Source

• Sage  
• GeoGebra
• SciLab 
• Octave 
• R – Highly recommend RStudio as well if you get R.
• LaTeX      

Commercial

• MATLAB
• MAPLE
• MATHEMATICA
• MINITAB

Useful resources links for software above

• SageMath Tour
• GeoGebra
• SciLab
• Octave 
• MATLAB
• MAPLE
• MATHEMATICA
• MINITAB