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GeezerVison is showing www.callstack.com — React Native & AI Open Source Tools | Callstack OPEN SOURCE Built for teams and agents to ship fasterFrom core libraries to AI agent infrastructure, our open source work helps teams build better apps and gives agents the tools they need to work inside your codebase. 50M+ Downloads / month 300+ React Native commits 67K+ GitHub stars 150+ OSS Projects Used across production apps Teams use our libraries every month to build, test, release, and improve React Native products at real high-trafficproduction scale. Part of the React Foundation We help shape the framework your mobile products depend on. Our open source sits close to the decisions behind React Native. Maintained with the community These projects grow through real usage, contributor feedback, and engineers who ship production React Native apps every day. The stack for AI-native delivery From core libraries to agent infrastructure, our projects give teams and agents the tools to work inside real codebases. Open source Tools for teams and agents.From core React Native libraries to agent infrastructure, these projects help engineers and AI agents inspect, validate, automate, and ship real apps. Project Function Downloads/mo Stars React Native Testing Library Simple and complete React Native testing utilities that encourage good testing practices 18M+ 3k+ React Native Pager View React Native wrapper for the Android ViewPager and iOS UIPageViewController 5M+ 3k+ Re.Pack A webpack-based toolkit to build your React Native application with full support of webpack ecosystem 2M+ 1k+ React Native Builder Bob Simple set of CLIs to scaffold and build React Native libraries for different targets 1M+ 3k+ Rozenite Plug-and-play panels for React Native DevTools. Install, enable, and start debugging in minutes. 959k+ 663 React Native Harness Harness brings Jest-style tests to real native environments so you can test TurboModules like you would test your React Native app: with JavaScript. 179k+ 332 React Native Legal Automagically generate license acknowledgements for your React Native app & any JS project 139k+ 362 React Native Brownfield Incrementally move your iOS and Android apps to React Native without breaking 94k+ 552 Voltra Voltra lets React Native developers build native iOS Live Activities, Dynamic Island layouts, and widgets as React components without writing Swift. 88k+ 844 React Native Vision OS A framework for building native visionOS applications using React Native 15k+ 1k+ React Native Sandbox Run multiple, isolated React Native instances within a single application 15k+ 220 Agent Skills Callstack’s best practices on React Native performance optimization, upgrading, CI workflows, and brownfield migrations 1k+ React Native Evals A benchmark suite for evaluating how coding models solve real React Native tasks 111 Apex Agentic coding model for mobile and web Agentic Delivery Turn AI into better software delivery.From redesigning development workflows to building custom agents, testing their output, and choosing the right models, we turn AI into a practical part of product delivery. ISO 27001 · React Foundation · 100+ Enterprise Clients · 7B+ active users · Backed by Viking Global · ISO 27001 · React Foundation · 100+ Enterprise Clients · 7B+ active users · Backed by Viking Global · ISO 27001 · React Foundation · 100+ Enterprise Clients · 7B+ active users · Backed by Viking Global · ISO 27001 · React Foundation · 100+ Enterprise Clients · 7B+ active users · Backed by Viking Global · Events Meet the engineers behind the work.Join talks, workshops, and live sessions from the people building React Native, open source tools, and AI-native delivery workflows.  Agent Conf warsaw / Poland 17–18/09/2026 Cross the threshold into agentic development.Two days in Warsaw with the engineers designing, debugging, orchestrating, and adopting agents in real software teams. Buy ticket discord Talk agents, apps, and open source.Join the Callstack Discord to discuss React Native, AI-native workflows, agent tooling, bugs, ideas, and contributions. |
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