Second version of Cclite (now 15 years old), based on Mojolicious, Postgresql and a native RESTful interface. It's designed as an engine rather than a web application, but an html interface (reduced for mobile) is still provided. Also a simple test suite.
You will have to hand modify (at least) postgres pg_hba.conf to get a working installation. The postinst in the deb package is now fairly 'question and answer'. We'll put some of the currently worked on defects onto a wiki page.
If you want to experiment with intertrading you will need rabbitmq: https://www.rabbitmq.com/install-debian.html#apt
I've chosen this, it's stable and supports many of the pub/sub protocols. SOAP and cclite's registry <-> is gone