They're the creation of @researchbuzz, and there are so many of them that's it's hard to choose just one to highlight, but I'm enormously fond of "#GossipMachine":

> A powerful tool that uses Wikipedia page views to surface potential “news days” in a given year for any topic with a Wikipedia page. By analyzing daily page views and flagging dates with significantly higher-than-average views, Gossip Machine provides you with pre-filled Google News and Google Web search links.

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