Skyscanner - Compares millions of flights to find you the cheapest deal

Agree, although the comments are still interesting. When Google Flights appeared this was basically the end for the current version of Skyscanner, hope the team are working on something new. Personally I feel that the site is not as good as a few years ago, maybe because they are succumbed to sponsoring airlines? There definitely appears to be a bias now.

One of the best software I've ever used for travel planning, simple navigation and menu, device friendly, fast enough

Pros:

navigation, interface

Cons:

can't find yet :)