Glyphy - Copy & paste fancy fonts + cool symbols ☞✺✐™
KeyCastr - KeyCastr lets you easily display your keystrokes while recording screencasts.
Raycast - Fastest way to control Jira, GitHub and other web apps
Carnac - A utility to give some insight into how you use your keyboard/
MyPopClip - The most basic feature of MyPopClip is to select a text with the mouse to do the copy and paste action, saving us the usual Command+C or V trouble, but the real power of this tool lies in the use of its extensions.
Key-mon - Utility to show live keyboard and mouse status for teaching and screencasts.