There are a few public pages that allow performing a Timatic visa check, such as this one on the Emirates website. Are there any that accept multiple passports and show all the results at once? I don't need them to process the results for me and tell me the best passport to use - I can do that myself - just show me all the results without making me submit the form multiple times.
Similarly, Wikipedia has great visa requirements maps by country of citizenships. Are there any tools that would generate such a map for multiple citizenships? (How does Wikipedia even get the data for those maps - is it automated or human volunteers checking Timatic manually?)