Some ideas

Some software you might find useful

Concept Maps
• Coggle has LaTeX support for mathematical notation
• FreeMind
• FreePlane - based on FreeMind, but with support for LaTeX if you want to use mathematical notation

Drawing Graphs and other visualisation
• GeoGebra - also has a 'slider' function so you can investigate what happens if you change a variable

Typing Notes
• It is possible to type mathematical notes in Microsoft Word including entering equations without using the mouse. Information to get you started: Getting started with effective entry of equations in Word.
• To use more advanced mathematical notation and diagrams some people decide to learn to use LaTeX, a typesetting system for mathematical documents. Information to get you started: Getting started with LaTeX.

Audio software
• Audacity
• NCH Wavepad