Ask HN: Best paid SaaS for developers?

1 pointWalkman2 comments

There are a ton of paid web services to make developers life easier:

* Code management tools (Github, Bitbucket)

* Issue trackers (FogBugz, Trello)

* Project management services (Basecamp, Jira)

* Customer service/user feedback systems (Userecho, Uservoice, Zendesk, Useresponse)

* Task management tools (Wunderlist, Asana, Zendone)

* Note taking services (Evernote, RememberTheMilk)

* Training sites (Nettuts, Tutsplus, Railscasts, Lynda.com)

* Theme and other marketplaces (Themeforest, Creativemarket)

* Service integration services (Zapier, IFTTT)

* etc, etc, etc

Which one can't you live without and why? (Not only from the list, but URL please!)

How much does it make your life easier in what way? (If not trivial.)

Only paid services please!