Creative ideas for simplifying signup and login experiences. Geared towards web, but many could be used for mobile as well.
A/B testing examples that might help you to decide whether to use that marketing popup or not (of course, the only way to really know is to do some A/B testing of your own!)
ABTests.com - Various websites can share and comment on the results of their own A/B tests
Which Test Won - A “hot or not” style gallery where you guess which test won before seeing the answer & proposed explanation
Beautiful website for Carbonmade, an online portfolio creation system. I haven’t even signed up for the service and I’m already in love.
Also, there is plenty more to be inspired by in the examples section.
Type in a URL and an overlay shows where “the fold” is for users on various screen resolutions.
Cool tool for analyzing website performance. Includes a breakdown with suggestions for improvement.