Some image MD5 filters for 4chan-X (guro, frogs, goldface and other garbage): https://ghostbin.com/paste/kwmgn
Not everything is supported, but it's a good tool.http://www.regular-expressions.info/
This one has pretty in depth explanations.
You can apparently filter image hashes via 4chan-X. You can't filter your own posts if your browser has cookies enabled. Use forward slashes to start using regular expression, and put an 'i' at the end to ignore capitalization. '\b' is a word anchor, so you can do something like /\bhi\b/ to only filter the word hi but not high.
Post screenshots of your user style and or show us some neat tricks.
Border Editors: (works great for reply windows)http://www.cssmatic.com/box-shadow
Text Shadow Generator:http://css3gen.com/text-shadow/
Add custom mouse cursors with CSS:https://developer.mozilla.org/en-US/docs/Web/CSS/cursor