Despite the awkward naming this clipboard manager app is really easy to use and provides life saving utility by storing everything you cut or copy in a searchable list.
The Wunderlist app for OSX is very simple and easy to use, all the functionality of the website in a desktop widget. It almost feels like a mobile app, and works just like the iPhone version which is great.
Notes is built in to OSX Mavericks as well as a few other iOS apps that have made the successful crossing such as Messages, Reminders, Photo Stream, etc. Its really convenient having synced notes on all your Apple devices instantly.
Coda is a very good web development App for Mac that has FTP built in as well as a nice code editing interface with lots of helpful tools. Coda 2 also works with iCloud and neatly backs up and syncs all your files.
5. iKeyboard Remote
This nifty little utility allows you to control your Music app on your iOS device by pairing over bluetooth. For me this means I can shuffle tracks, change the volume, and pause my iPhone while it sits happily on the speaker dock in the corner of the room.