This one is obvious lol

CSS generator for gradients, box shadows, etc.

Basically CSS wordart

Generates CSS to style your scrollbars.

REALLY good website. Too many tools to list. Dan's got it all.

Tutorial on how to use flexboxes.

Basically essential reading. Also includes code for purely fun page elements.

Good cheatsheet for various CSS codes.

Various coding guides - CSS and JS.

JS codes for navigation bars.

Wall of flashing web buttons. Photosensitivity warning, but very fun.

Loads of pixel art.

Repository of old web graphics and gifs.

Repository of usermade blinkies. Blinkies are fun!

Library of goofy ass old web style graphics.

Small collection of various page element graphics and pixels.

Palette generator! Offers previews of what the palettes look like in various mediums. Additionally, allows users to copy the color in a variety of html code formats, other than just hexcode.

Search engine for old web graphics.

Collection of user-made CC0 game assets. Lots of pixel art!

Collection of web graphics - good resource for favicons.

Transparent textures to make your site a little crunchier.

Mobile friendly 2-3 column layouts.

Great 1-3 column layout generator! This page is built using it as a base!

Variety of cute page themes, tumblr themes, and code snippets.

Fun iframe based layouts.

Web collage celebrating old web design. Great source of gifs too lol

An archive of typography. Great source of inspiration.

Fan archive of Sailor Moon materials & translations.

Collection of vintage homoerotic illustration.

Again, another essential read. Great list of resources.

Links to coding guides, graphics, and other resources.