Over the past few days I made an open-source GDS, message router, departure control system, faring engine, and a bunch of other airline systems. It supports Type B/AIRIMP, EDIFACT/PADIS, NDC, MATIP; PNRs, tickets, EMDs, queues, IROPS; PNL/ADL, bags, loadsheets, MVT, ACARS, flight plans, and more...
Source: [Hacker News](https://github.com/adamf/jetway)