I was looking for a nice key organizer. I've found one designed as a honeycomb and I really liked the idea. Because I wanted it to be bigger, with more cells, I decided to create a tool that would help me to design it. If you are interested, you can find its source code on GitHub.

The tool (designer) allows you to:

• specify various dimensions
• design the shape and cell types you like
• set the position of wall-mount holes
• preview the model
• export the model to STL