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There is a big number of Stack Exchange sites, so much so that sometimes it's difficult to choose the more appropriate site for our questions. Sometimes there is more than a site that fits to our question. For example, when I have a question about a engineering problem governing by a differential equation and that I want to solve with a computer algebra system implemented in a library in python lenguage. That type of question covers several subjects and it's complicated to choose 1 site for that question. I was search about how I can find the Stack Exchange site which fit to my question, and I found the next question:
After read that question, I consider that searching the site's tags and reading their tag wikis and to see the frequency of the use of the tag helps a lot to know if my question fits to the site. But search the tags through the all possible sites is a hard work, so I would like to know if exist a way to list all the tags used throught all the Stack Exchange sites. This will help us to find a specific tag that fits to my question and then to find which SE site this tag belong to.
Is there a way to list all the used tags through all the Stack Exchange sites? or is there a webpage that contain that list of all tags of all Stack Exchange sites?