Enhance your searching through regular expressions.

Simple easy-to-use reverse search, it may not always illuminate, but at times can be useful

Classic alternative to Windows and MAC OS, not all your software will work and there is a bit of a learning curve, but what you do have will be far more under your control.

Wolfram|Alpha for the scientific and mathematically inclined

Python along with a coding book for beginners

R Free statistical software (not the most user friendly but free and powerful language)

Github a prolific platform that allows developers to connect and publish code

Gliffy free software for developing flow charts and code diagrams

Jetbrains free IDE (for non commercial use), VS Code is pretty cool too