SmallDevTools - Handy developer tools with a delightful interface
Algorithmia - Algorithmia makes applications smarter, by building a community around algorithm development, where state of the art algorithms are always live and accessible to anyone.
whatdevsneed - This is whatdevsneed.
neptune.ai - Neptune brings organization and collaboration to data science projects. All the experiement-related objects are backed-up and organized ready to be analyzed and shared with others. Works with all common technologies and integrates with other tools.
Google Open Source - All of Googles open source projects under a single umbrella
Weights & Biases - Developer tools for deep learning research