The records I tend to index are Hungarian language births-marriages-deaths. The program allows volunteers to pick their project from about a hundred choices, and the above is challenging yet within my capabilities. Yesterday I saw that Cascade County Montana obituaries were being indexed, and since a large part of my Grandfather's family settled there, I downloaded a few batches of those for a change.
Immediately, familiar names showed up--not necessarily relatives, but people who had settled near my people in the coal mining settlement of Stockett Montana. And then I saw the name Barney Bubnash in the obituary of one of his step-siblings. Barney's parents had both been married multiple times, so he had plenty of steps. He was my Dad's second cousin. I never met him but we talked on the phone before his death.
In 2012 when the big push was to index the 1940 Census, I was randomly sent a batch of Montana census pages. Entering data line by line down the page I was momentarily startled to see a family I had known well. There was my friend Claire in 1940 with her first husband and her son Bruce. In the mid-60s I babysat Bruce's children who lived 2 houses away from me. Years later Bruce's mother Claire was my neighbor.
Amazing that I would see anyone I know or know of, given that over a billion records have been indexed to date. This link will take you to the indexing home page. Watch a couple of the short introductory videos and give indexing a try!
a typical Hungarian-language parish record