Nietzsche was very fond of him. Alain de Botton devoted an interesting chapter of The Consolations of Philosophy to him. I’ve had the Essays in the stack of books to read for a while now. And Sarah Bakewell has written what looks to be an interesting book about him:

These days, the Montaignean willingness to follow thoughts where they lead, and to look for communication and reflections between people, emerges in Anglophone writers from Joan Didion to Jonathan Franzen, from Annie Dillard to David Sedaris. And it flourishes most of all online, where writers reflect on their experience with more brio and experimentalism than ever before.
Bloggers might be surprised to hear that they are keeping alive a tradition created more than four centuries ago. Montaigne, in turn, might not have expected to be remembered so long, least of all in the English language—yet he always believed that such understanding between remote eras and cultures was possible. “Each man bears the entire form of the human condition,” he said. We are united in the very fact of our diversity, and “this great world is the mirror in which we must look at ourselves to recognize ourselves from the proper angle.” His book is such a world, and when we look into it there is no end to the strangeness and familiarity we might see.