Every Friday, find five quick links about compelling technologies, emerging trends, and interesting ideas. Source: the internet.

1. Facebook’s Q2 numbers are in and the company appears to have mastered mobile ads — which now make up 41% of ad revenue.
2. Google delivered Chromecast, a device that lets you watch the web on your TV for $35, and competes with the likes of Apple TV and Roku. Its approach is fundamentally different, though, using your smartphone as the interface for the TV experience.
3. YouTube releases customizable subscribe buttons to allow users to follow channels from anywhere. It’s another way to promote the high-value content channels, channels you might develop a fondness for and watch on your TV screen via, say, Chromecast.
4. Flipboard affirmed its position as both distributor and competitor to its content providers by launching a web-based version of the service. Publishers have used Flipboard to reach audiences on iPad, but may have questions about a web-based version that runs ads like their own sites.
5. Visiting your parents this summer? Just how many times do you think you’ll see them before they die? This app offers up a best guess based on WHO health statistics — and provides great material for guilt-purveying mothers everywhere.