I use Memoires every single day as a place to capture notes and todos at work. I've tried and purchased a myriad of task managers (such as Things.app), note-taking tools (such as Evernote), and document "buckets" (like Yojimbo), and never managed to find a consistent workflow that I was happy with.
Memoires is ridiculously simple. I enjoy taking notes and filing them by date. I take pictures of whiteboards at meetings with my iPhone and paste them into my notes for later reference.
For "buckets" of research documents where the date isn't that important, I switch it to "All Entries" view.
Files stored by Memoires also work consistently across machines sharing a Dropbox account. This isn't always the case with other pieces of journaling software out there.
Though it uses Sqlite for storage, I'd appreciate seeing would be the ability to export my entries to another database-like format, even if it were CSV, XML, or something like that.
Again, Memoires isn't fancy, but it works, and I was happy to pay for something void of clutter that I use almost every day.