Productify - Sell your WordPress content using Gumroad
Knotable - Cut the noise out of busy email threads
Typeboost - Music stops when you stop typing. Stay focused while writing
Scrapbox - A new style of note-taking that lets you create, discuss, and learn together in one self-organizing space.
Alternote - OS X note-taking app for Evernote.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.