I rolled my own solution a couple years ago: https://gridpass.io/

Your master password is remembered visually, instead of as an arbitrary string. My contention is that you're less likely to forget specific spots on distinct images than an arbitrary sequence of characters. The method has worked perfectly for me since I began using it, but only one other person I know uses it, and it has NOT been audited or scrutinized by an expert in the field. Nonetheless, check it out. It's free, being more of an idea than a technology. Besides, I can't charge you for something you've stored in your own visual cortex!