A quite useful and a hidden gem inside Houdini is its feature to record the name (and computer) of the creator of every single node ever created. It's not displayed anywhere by default so I wrote a Python script to color nodes by their creator and also add this name as a suffix to each node.
Very handy when debugging and/or inheriting someone else's scene/setup or HDA. Now you know who to blame :P
After installing the preset, just create a Null node and then load the preset, or run the Python script manually using shelf/hotkey/Python SOP/OBJ node.
It also shows a summary of all artists sorted by the number of nodes each person created. The above image shows the HeightField Erode SOP is created by 2 people at Side Effects Software.
Original idea by Imre Tuske.
You can download the Null preset file here:
https://www.dropbox.com/s/nnud9bmbdb8zan3/null.idx?dl=1
Here is the code for reference: https://pastecode.xyz/view/a1c1a9bb