* [Flagsmith v2.265.0](https://github.com/Flagsmith/flagsmith) – Feature flag and remote config service for managing feature toggles across applications.

* [LaunchDarkly Relay Proxy v8.21.0](https://github.com/launchdarkly/ld-relay) – Proxies a single streaming connection to multiple local clients for feature-flag SDKs and optionally forwards analytics events.

* [LaunchDarkly Server-side SDK for Ruby 8.15.0](https://github.com/launchdarkly/ruby-server-sdk) – Server-side Ruby SDK for evaluating feature flags, sending events, and handling flag updates.

* [PostHog Go v1.24.0](https://github.com/PostHog/posthog-go) – Go client library for capturing events, user traits, errors, and evaluating feature flags.

* [flopflip v15.1.12](https://github.com/tdeekens/flopflip) – Feature toggling library for React applications with support for Redux and broadcasting systems.

* [Unleash Client SDK for Node.js v6.12.1](https://github.com/Unleash/unleash-node-sdk) – Node.js SDK for integrating with a feature management platform to evaluate feature flags server-side.