Mac: If you've ever spent an hour using Photoshop or GIMP to create tutorials by inserting instructions onto images you'll enjoy Clarify. The app creates a screen capture and allows you to append and highlight the image. Unlike other apps, Clarify has the ability to take a delayed screenshot.
The app is currently in beta. The production version won't be free, but Mac users can download the open beta release right now at no charge in exchange for leaving constructive feedback.
Creating the quick setup rules for The Settlers of Catan in the image above was a very quick process using Clarify. I took a screen capture of the image I wanted to use, added number buttons for each of the steps, and created text boxes for each step. You can also add in arrows and use a blurring tool to obscure any private info. Again, all of this can be done in Photoshop or GIMP, but Clarify simplifies the process.
Clarify files also work with the socialisation features of Screensteps.me or Clarify's own network if you (optionally) create an account. Screensteps is a software documentation tool created by the same developer that is similar to Clarify yet geared toward developers creating manuals. Clarify is a clean, quick app that simplifies tutorial construction. Grab the free open beta version before the official release hits.