Tool to write up own 40k missions including map creation with deployment zones and objective settings, drawn and measured out with canvas app, will also write in plain english measurements for any deployment zones / objectives. Text Editor to add specific misssion primary / secondary objectives and some narrative. Has an Export to PDF tool so you can actually use it.
Tool here: http://howjparty.co.uk/krumpmaker.html
I thought html canvas stuff would be fun, but it turned out it was all secretly maths. Would not complete as a leisure task again.