For my nails I use the Sephora Collection Crystal Nail File ($10). The best thing about this crystal file is that you can wash it and use it for years. I recommend keeping it in its hard case so you don't break it. I have.
I used Shu Uemura's eponymous eyelash curler for many years but wanted to find a cheaper alternative. I tried Shisheido and that one didn't work for me at all. It just didn't fit the shape of my eye correctly in any way. I finally found a winner from Tarte. I have bought two or three now because I love the cute handle designs they come out with. It's $19 and comes with a mini mascara.