I'll give you one of my personal modifications...
Code:
Title: Highlight
BB Code Tag Name: highlight
Replacement:
<span style="background-color:{option}">{param}</span>
Example: [highlight=yellow]this is highlighted text[/highlight]
Description: The [highlight=color] tag allows you to create highlighted text.
There's already a
[highlight] bbCode, but it doesn't accept parameters. This bbCode "overloads" the highlight bbCode to give stuff a background color. I made a custom text editor to also have a color picker that does it for you - do you want that too?