SmallDevTools - Handy developer tools with a delightful interface
Trending Duck - Get data driven trends of top physical/ecom products, weekly
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
TrendUp - Where trends are born.
Profitable developer tools database - A database of 103+ hand-curated profitable developer tools
Contributions for GitHub - Show your GitHub contributions graph on your iOS Devices