I suppose this isn't an actual tool, but it is in some way. You know when you're glueing several boards together to form a panel (especially thicker boards) and they don't quite align? Some are a tad thicker than others so you end up high areas, low and so on. Cleaning the squeeze out is no fun and your fingers can get covered with glue.
Quite by accident I found a partial solution. Cut angled strips from 2x4s or really any other wood and cut them about 1 1/2" wide. That thin edge will reach down to grab the glue out of low area because of the slight flex. It works great and cost next to nothing. I'm sure there are plenty of other ways to do the same thing, but so far this has worked better than anything else I've tried. About a 7-10° angle seems to work the best. It's basically little more than just the trash leftover from other projects, but I occasionally do find legit reasons for saving the trash.
I figured it's time to change my signature so hold your breath. This is it.
Marty or Marty Farty if you feel mean.
Have you tried making yourself a bunch of cauls for your glue ups? That will 100% fix your problem of uneven surfaces. I take a few thin swipes with a plane towards the outside of mine so slightly more pressure is in the middle. Keep them waxed and they last forever.