Anki Flashcards
Spaced-repetition flashcard app
Coda
Online relational database tool.
Draw.io
Graphics software for creating diagrams.
Git
Source control command line tool
ImageMagick
Command line image processing tool
Inkscape
Vector graphics program
insync
Cloud storage synchronization tool
MathPix
Optical Character Recognition (OCR) tool for generating LaTeX code based on handwritten and printed mathematics.
Meld
Graphical file and text diff tool
Notability
PDF annotation app for iOS
Noteful
Well-designed PDF annotation app for iOS
Obsidian
Knowledge base software using Markdown note files
QuickScan
PDF scanner and OCR app for iOS
TikZ
LaTeX graphics library
Visual Studio Code (VS Code)
Highly customizable IDE, which can be configured to be one of the best LaTeX editors available.
Zotero
Reference management system.