DotPass 1.5.5 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The program lies within Security Tools, more precisely Personal Security. This Mac app was originally created by Lost Minds.
From the developer:
DotPass is an app for generating and retrieving passwords. You enter a graphical pattern in a dot grid and a plain text seed word (like "facebook", "work email" or whatever makes sense to you), and the app then generates a password based on this unique combination.
Tap the password to copy it, and then past it into whatever login form you need it for.
You may want to check out more Mac applications, such as Secret Folders, Ghost or Password Repository, which might be similar to DotPass.