Here I'll include links to any useful or interesting sites and resources I find around the web :)
Gifs and Graphics:
blinkies.cafe - Blinking animated badges with customizable text.
gifcities.org - Search engine for animated gifs, by the Internet Archive.
cyber.dabamos.de - Collection of over 4000 88x31 buttons.
win98icons - Collection of every Windows 98 icon.
Games and Software:
myabandonware.com - Freely available retro games that have been abandoned by their publishers.
abandonwaredos.com - Abandonware games, specifically for MS-DOS and older Windows platforms.
Website Features:
atabook.org - Free guestbook service with message control and the ability to reply to messages.
pollcode.com - Free poll service where you can set questions and view the results.
gifypet - Animated pet to guard your website while you're gone.
hekate - Fun quizzes whos results you can dispaly, website builder, button maker and more.
Miscellaneous:
lospec palette list - Huge collection of colour palettes that I use for pixel art.