Read about them here.
Here's Diebold's website. When I read their slogan "We won't rest," I think they mean "We won't rest until Republicans win every election."
And here's Blackbox Voting.org that's critical of Diebold; Diebold's attorneys removed access to that site because of purported copyright violations. When copyright blocks free political speech, it's time to change copyright law.
We'll have to resort to a New Zealand website to read about "Blackbox Voting." Read it while you can. Many more links here.