myabandonware.com and oldgamesdownload.com - Free digital archives of old games that are no longer commercially available.

dosbox.com - A free DOS emulator software for installing and running old MS-DOS programs and PC games. Instructions on how to mount a drive is available on the site itself. Great to use in conjunction with abandonware :)

archive.org - The biggest mammajamma of digital libraries hosting tons of media and software. There are a lot of old public domain movies on here.

unsplash.com - Host of non-copyrighted images provided for free by volunteer photographers.

w3schools.com - One of the best resources when it comes to learning how to code in all kinds of coding languages.

3dgifmaker.com - What is says on the tin; cool website where you can make 3d gifs out of uploaded images.

photopea.com - In-browser photo editing software as a completely free alternative to adobe photoshop if you're worried about sailing the high seas.

dither-me-this - Webtool for dithering images, which will not only give it a neat look, but also reduce image size and improve loading times.

CRT display - A nifty code for putting a crt filter over a page using CSS and keyframes.