Clean Google Calendar

Google Calendar is a nice app, designed to work with Chrome and other Google products to keep you up-to-date at all times. Many people use it for business and daily life. However, it could be improved, which is where Clean Google Calendar comes in. This free add-on to Chrome uses your existing calendar but through a new interface, redesigned to be easier to use. This straightforward new view is open-source so itis being improved all the time. You can see and manage dates much easier and open them like a desktop app.

Pros:

Keeps all your existing Google Calendar info.

Open source for constant upgrades.

Nicer, more intuitive display.