I missed your post about SimHub but found it myself yesterday and it's great.
It runs as a windows app and comes with a number of dashboards, but also has a full dashboard designer built in. It automatically picked up Afterburner allowing me to use a lot of data from that on a dashboard. It also has a plugin for ptracker and assetto. Like Z1 it can also see other people on the track which is can show on a map or have a timing screen. It also has an SDK so you can make your own plugin to provide any data you want to the app and use it on the dashboard. It also allowed you to bind button presses to functions that you can't usually set up such as turning driver names on and off.
You just click the dash you want and click 'Display on second monitor' or 'Display on phone' if you want to show it on your phone.
It looks a lot nicer than the Z1 built in dashboards and being able to create your own is very cool. It had some nag screens and limited the dashboards to 10fps unless you donate, but the minimum donation was 3 euros and I got my license key straight away.http://www.racedepartment.com/downloads/simhub-diy-sim-racing-dash.10252/
There is a link on that page to another page of custom addon dashboards.