Startup Stash - A curated directory of 400 resources & tools for startups
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
StartupResources.io - Tightly curated lists of the best startup tools
SmallDevTools - Handy developer tools with a delightful interface
Startup Collections - Resources & tools for entrepreneurs, designers & developers
GitHub Student Developer Pack - The best developer tools, free for students.