sadgrl online for the layout maker, and some other really cool webdev projects. We all know em, we all love em.

W3schools for years of being a great quick resource for HTML and CSS tips.

7.css, developed by khang-nd using the xp.css framework.

Pokencyclopedia.info is a fantastic resource for pokemon sprites.

Mewheart, now long defunct, but thankfully archived, the site had some really cute pokemon themed website assets.

werewolfdev for their recreations of Windows XP icons. Their deviantart is long inactive, but the free-to-use icons remain.

The Spriter's Resource is a great archive of sprite sheets from most games.

gateway-2000 on tumblr, one of many who have been archiving old web graphics.