Today a new data portal is being launched in Thurgau: https://data.tg.ch/ 
(Retweet) The datasets are all harvested on Kanton Thurgau | opendata.swiss - nevertheless, a dedicated portal allows the canton to offer special features, such as more fine-grained filtering. Since I helped with the earlier data catalogue, which can still be found here, I thought we should celebrate this with a better list of all the portals - and started this quick gallery:
★ Add another portal!
I first considered to update dataportals.org, and we can still do this later - in any case we should aim to keep our data compatible with their schema. There is also an interesting Airtable of „data institutions“ at the ODI.
Other lists of portals that I am aware of include:
- Open data portals in Switzerland (an earlier post on this forum)
- Open Data – Portale und Anwendungen – Web2 Unterricht
- Open Data Inception - A Comprehensive List of 2600+ #OpenData Portals in the World
- Opendata.ch » Suchergebnisse » portal
- data:ch [make.opendata.ch wiki]
How is this useful? In addition to keeping an eye and providing feedback to government projects, we could use this to keep track of vital statistics on each portal, as a lightweight community monitoring. Please use this form to help get all the known portals in the local universe on this list, or message me for direct access to the table.