MongoDB appender.
Requires <https://github.com/congomongo/congomongo>.

Franzy (Kafka) appender.
Requires <https://github.com/ymilky/franzy>.

Appender that sends GELF messages to a centralized logging server
(e.g. Graylog). Requires https://github.com/Graylog2/gelfclient.

IRC appender. Requires https://github.com/flatland/irclj.

Appender that sends output to Logstash.
Requires Cheshire (https://github.com/dakrone/cheshire).

Requires <https://github.com/pkpkpk/cljs-node-io>.

JDBC PostgreSQL database appender.
Requires <https://github.com/clojure/java.jdbc>,
         <https://github.com/swaldman/c3p0>.

Rolling file appender.

Rotating file appender.

Sentry appender.
Requires <https://github.com/sethtrain/raven-clj>.

TCP socket appender.
Requires <https://github.com/technomancy/server-socket>.

Slack appender.
Requires <https://github.com/julienXX/clj-slack>.

Requires <https://github.com/java-native-access/jna>.