I can speak of Eclipse, you can customize it.
Click on Window -> Preferences, and search for General -> Editors -> Structured Text Editors -> Task tags, or for Java -> Compiler -> Task tags (there might be some additional ones like for JavaScript, PHP, StatET, etc.)
TODO, FIXME, XXX
I use some additional ones like:
CHECKME, DOCME, TESTME, PENDING
I personally like to use the DISCUSS/REVIEW tags just to make sure I speak about some issue with someone during a code review or pair programming (e.g., I haven’t misunderstood the specification how something should work etc.).
You can also set the priorities assigned to the different task tags there too.