> For the complete documentation index, see [llms.txt](https://docs.ergo.services/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ergo.services/extra-library.md).

# extra library

- [Actors](https://docs.ergo.services/extra-library/actors.md)
- [Leader](https://docs.ergo.services/extra-library/actors/leader.md): Distributed leader election for coordinating work across a cluster
- [Metrics](https://docs.ergo.services/extra-library/actors/metrics.md)
- [Applications](https://docs.ergo.services/extra-library/applications.md)
- [Observer](https://docs.ergo.services/extra-library/applications/observer.md)
- [Meta-Processes](https://docs.ergo.services/extra-library/meta-processes.md)
- [WebSocket](https://docs.ergo.services/extra-library/meta-processes/websocket.md)
- [SSE](https://docs.ergo.services/extra-library/meta-processes/sse.md)
- [Loggers](https://docs.ergo.services/extra-library/loggers.md)
- [Colored](https://docs.ergo.services/extra-library/loggers/colored.md)
- [Rotate](https://docs.ergo.services/extra-library/loggers/rotate.md)
- [Registrars](https://docs.ergo.services/extra-library/registrars.md)
- [Saturn Сlient](https://docs.ergo.services/extra-library/registrars/saturn-client.md)
- [etcd Client](https://docs.ergo.services/extra-library/registrars/etcd-client.md)
- [Network Protocols](https://docs.ergo.services/extra-library/network-protocols.md)
- [Erlang](https://docs.ergo.services/extra-library/network-protocols/erlang.md): Erlang network stack