1. Git
An open source distributed version control system, which makes tracking and merging code changes much easier.
2. Apache Spark
An open source cluster computing framework that enables faster data processing and analytics.
3. React Native
An open source JavaScript framework for cross-platform mobile application development.
4. Node.js
An open source, JavaScript-based server-side runtime environment.
5. Vue.js
An open source progressive JavaScript framework for building user interfaces.
6. TypeScript
An open source superset of JavaScript that adds optional static typing.
7. Swift
The Swift programming language.
8. Bootstrap
An open source toolkit for developing with HTML, CSS, and JS.
9. TensorFlow
An open-source machine learning framework developed by Google.
10. Elasticsearch
An open source, distributed, real-time search and analytics engine for the web.