Coding-
Webmaster links- Sadgrl's list of resources to help you build your website. This ranges from accessibility to archiving, graphics, anything you might need.
HTML Cheatsheet- Website with a whole bunch of common html codes that you can copy and paste. great for beginners who are just starting to learn code!
Tiled backgrounds- Huge collection of tiled backgrounds to use.
Fonts- A list of cool fonts with a sci-fi/videogame theme.
Access/information-
Sci-hub- The goal of Sci-Hub is to provide free and unrestricted access to all scientific knowledge
12ft ladder- Remove popups, banners, and ads from any website
science.gov- Science.gov provides access to millions of authoritative scientific research results from U.S. federal agencies.
PDF Drive- Search and download PDF files for free.
MEGA folder of language and linguistics- Exactly what it says. Includes textbooks, dictionaries, learning worksheets, and more for learning hundreds of languages. Also includes history, science, and tons of other types of resources.
OneZoom:All life- An interactive map of the evolutionary links between all living things known to science.
100,000 Stars- An interactive 3D visualization of the stellar neighborhood, including over 100,000 nearby stars.