Below are some tutorials on specific languages or applications (note: at this point, these are not vetted; just examples).
Python
- python.org is on option for downloading the program. It also has tips for beginners through advanced users.
- Microsoft Store is another place you can access and download Python, with tips on the process.
- Using Python for Research is a free Harvard 5-week course that promises "Take your introductory knowledge of Python programming to the next level and learn how to use Python 3 for your research"
- PY4E, or PYthon 4 Everybody, is a website of introductory lessons, resources, and a book (free in epub/PDF format, but also available for sale via Amazon).
R
- LearnR is an interactive tutorial with examples and exercises
- Data Science: R Basics Harvard provides this 8-week long course that students can audit for free
Excel
- Excel Easy teaches Visual Basic to enable you to do macros in Excel
