JavaScript for Grease Monkey that runs custom JS on any page?

Is there a Java Script or "UserScript" that allows users to run any JS on any page?
I was wondering because i know enough javascript to understand some of it and manipulate it, but i've only written one js Script for a site and it wasn't even that great. I know i can run custom java script through the console but that's not what i'm looking for.

Suggestions/Links would be great, also UserScripts.org is down and the mirror doesn't have a search function >.>

You can run javascript in the address bar.
javascript: code

Quote:

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Originally Posted by HTML

You can run javascript in the address bar.
javascript: code

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That's even more useless.

How is that useless? Maybe if you suck it's useless. I've exploited like 40 sites through the browser.
Write your code in a text-editor and then post it to your browser.

Quote:

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Originally Posted by HTML

How is that useless? Maybe if you suck it's useless. I've exploited like 40 sites through the browser.
Write your code in a text-editor and then post it to your browser.

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^ He offers legitimate advice.

Not everything needs GreaseMonkey to operate. Sometimes good old fashioned Javascript does the trick just fine.

yea, this is how i used to use js before grease monkey.

you can fire code through bookmarks for management.