Add new testing tools to the list (Hacktoberfest accepted) :loudspeaker:

Before adding a new testing tool, please follow the contributing guide:

[ ] Search previous suggestions before making a new one, as yours may be a duplicate.
[ ] Make an individual pull request for each suggestion.
[ ] Chose the corresponding section.
[ ] New categories or improvements to the existing categorization are welcome.
[ ] Research if the tool you're including is actually awesome and useful. Thanks :female_detective: :male_detective:

ZoranPandovski / awesome-testing-tools