Tea Minus - The multi-device office drink round app
Dropzone - If you want your file uploads to work even without JavaScript, you can include an element with the class fallback that dropzone will remove if the browser is supported.
Evabot for Slack - Send coffee/beer as an appreciation gift to colleagues
Dropover - Mac app for easier drag & drop
QuizBreaker - A fun online quiz game for teams to get to know each other
Unclutter - Unclutter is an app that is designed to help Mac users bring order to their desktop. Among other features, this powerful piece of software provides quick access to a user's notepad and clipboard.