Download as PNG uses this Github project.
Download as SVG uses this one by Eli Grey.
The random generator used is taken from this project.
World maps and systems are generated using the Traveller5 5.09 Core Rules.
Optima font is the free version.
Data parsing from travellermap.com uses some code taken from here.
System symbolic map table uses ideas and CSS from Joshua Bell, taken from https://travellermap.com/tmp/sys.html.