The folks at Seven Dragons keep coming up with great apps for the Kindle, and they’ve done it again with Converter, a cool 99-cent Kindle app that will convert just about any unit of measurement under — or beyond — the sun into the metric medium in which you are working.

You may not know exactly how this app is going to help you over the course of the next year, but spending 99 cents now to get it onto your Kindle will mean that you won’t come up short when you need it. Seven Dragons has come up with four apps so far — Converter, Notepad and two games — and one of the things that distinguishes their work is that they are all very sleek and fast on Kindle.

They also do a great job of presenting their products, and I don’t mind cribbing off their work to share these with you:

• Kindle Converter Video
• Kindle Converter Close-Up
• Kindle Converter App Shortcuts
• Kindle Converter App Help

(Ed. Note: They’ve sponsored their apps on Kindle Nation before, but this post is not sponsored – it’s just what I think. –S.W.)