When designing or developing I regularly need some fake data : a name, an email address, a credit card number, some dummy text, etc.
I used the wonderful Faker package by Francois Zaninotto to create an Alfred workflow for those moments when I quickly need some fake data.
Check out my blog post to download the workflow and to learn how to use it :
http://blog.g-design.net/post/121829216975/an-alfred-workflow-to-generate-fake-data
I hope this will be of use.