The Orphan Espresso LIDO 3 grinder
Yes, it's silly expensive for a manual grinder, and large enough to be the murder weapon in a Perry Mason episode, but it's a damn fine piece of precision machinery, excellent at what it does, and will probably outlive me and you. Despite its size, the folding handle and carrying case make it good for traveling (think car camping rather than backpacking, though), and its adjustable range makes it suitable for whatever brew method you fancy, from Turkish through press pot coffee. And it's fast, too.
I had been using a Porlex at work for my caffeine dosage, but the Lido is so much better in every way that the Porlex is now our disaster recovery grinder at home.
One more thing in the Lido's favor: Doug and Barb at OE are nice, wonderfully quirky coffee fanatics (check out their YouTube stuff) with a fascination for vintage lever machines. What's not to love?