Jira is better than any other project management tool I've used, including BasecampAsana and Trello . However, Trello has a much different purpose to me and is still amazing!
Google Maps is best because it is practically free (they give you $300 in free credits per month and it's really hard to go over the free tier unless you really mean business) and it's the best!
We use Postman because it's easy to start creating HTTP calls to our RESTful API, is self-documenting, can create beautiful documentation with very little effort, and can quickly and easily run regression tests to see where your problem endpoints are! It can be as simple or complex as the use case requires!