If you mill PCBs, possibly by using Cadsofts Eagle and John Johnsons pcb-gcode, this little piece of software, written completely in Python, may speed up things dramatically by sorting and ordering the toolpath.
PCBs looking like this, stuffed with senseless G00 paths:
Will look totally different after gsort.py run over it:
Finally, after having a cup of coffee, or eight, we have **insert tataaa, here**:
Notes on using this with hp2xx.
Windoze "gsort.exe" (still command line, only!) available!
As usual, no docs (except for a readme in the zip-file), no warranty, no support.
For me, software is nothing more than a tool to get or keep my hardware running.