I wrote about Curio last year, and the past few months have brought quite a few additions to this creative brainstorming and productivity powerhouse. We already saw Evernote integration, and between the last two releases (6.0 and 6.1) Curio has added support for tables, "figure stencils," better copy-as-text, and a lot more.
The figure stencils are great, allowing you to create figures such as mind maps, tables, notes, lists, etc., and save them for re-use. For example, I have stencils for different styles of lists with skeleton headers already included, and "Approved" and "Rejected" labels to drag onto mockups. The tables and index cards allow for a lot of visual organization within a space, just in case you're not an entirely free-form kind of person.
The full release notes for the latest version (6.1) are available here. Curio is available in 2 versions, both with free trials. The Professional Edition is $149US and the Standard version is $99US (comparison), academic discounts available. Version 6 is a paid upgrade for 5.x users, and upgrade prices start at $49US, depending on what you're upgrading from and to. If you want to see Curio in action, check out the "Tutorinis" at the bottom of the Curio homepage.