Hacker News Reader

Not sure exactly what you mean by "backlinks", but most of the software is custom-built.

ah. backlink = back references, Figure 1.1 and link to the Figure 1.1 :)

What your license for the project? If we wanted to use it, we'd porting it to Go and JS with our own stylized CSS.

Cross-references are all custom. License is MIT. [1] Porting would likely be a huge PITA.