Mac: Day One is one of the nicest journalling apps out there. And today it has released an update that adds a bunch of new features, including handy options specific to OS X Mavericks.
The two Mavericks-specific features are a new map view and location editor. This makes it so you can easily browse where and when you took notes right from the desktop app. Otherwise, everyone gets a bunch of other new features, including timeline filters, new headers, better exporting, keyboard shortcuts and the ability to add weather data.
Day One ($10.49) [Mac App Store]