Whimsical
Visual workspace, online tool for quick diagrams
Mathcha
Online WYSIWYG Formula Editor . Fast and powerful Editing features, inputting Normal text, Math symbols, and drawing Graph.
Detexify
Anyone who works with LaTeX knows how time-consuming it can be to find a symbol in symbols-a4.pdf that you just can't memorize. Detexify is …
Unpaywall
An open database of free scholarly articles for you to legally download research papers for free.
On Being a Scientist: A Guide to Responsible Conduct in Research
A guide to responsible conduct in research.
Phylopic
Free silhouette images of animals, plants, and other life forms, available for reuse under a Public Domain or Creative Commons license.
Undraw
Open source illustrations
Unsplash
Free high resolution images.
Academicons
ICONs for academia
Asciinema
Command line recording and sharing.
Bashplotlib
plotting in the terminal using plaintext
Scholarpedia
the peer-reviewed open-access encyclopedia, where knowledge is curated by communities of experts.