Useful Links

publik
Free, open-source alternatives to the apps that charge a subscription.
publikhq.com

Untools
Thinking tools and frameworks for solving problems, making decisions and understanding systems.
untools.co

Parrot
Push-to-talk dictation for macOS. Free, open source, and it runs entirely on your Mac.
perroquet.xyz

MIT OpenCourseWare
Lecture notes, problem sets, exams and videos from almost every MIT course, free and with no sign-up.
ocw.mit.edu

Machine Learning and Data Mining I
Northeastern's DS 4400 syllabus, open at its textbook: An Introduction to Statistical Learning, in Python.
zohairshafi.github.io