| AppenderAWSCloudWatchLog | Log to AWS CloudWatch Logs |
| AppenderDbi | Log to databases via DBI |
| AppenderDigest | Abstract class for digests (multi-log message notifications) |
| AppenderDt | Log to an in-memory data.table |
| AppenderDynatrace | Log to Dynatrace via HTTP |
| AppenderElasticSearch | Log to ElasticSearch |
| AppenderGmail | Send emails via the Gmail REST API |
| AppenderMail | Abstract class for email Appenders |
| AppenderPool | Log to databases via pool |
| AppenderPushbullet | Send push-notifications via RPushbullet |
| AppenderSendmail | Send emails via sendmailR |
| AppenderSyslog | Log to the POSIX system log |
| LayoutDb2 | Format log events for output to databases |
| LayoutDbi | Format log events for output to databases |
| LayoutDynatrace | Format log events for output to Dynatrace |
| LayoutElasticSearch | Format log events for output to ElasticSearch |
| LayoutMySql | Format log events for output to databases |
| LayoutPostgres | Format log events for output to databases |
| LayoutRjdbc | Format log events for output to databases |
| LayoutRjdbcDb2 | Format log events for output to databases |
| LayoutSqlite | Format log events for output to databases |
| select_dbi_layout | Automatically select appropriate layout for logging to a database |
| Serializer | Serializers |
| SerializerJson | Serializers |
| transform_event_dynatrace | Transform a log event for Dynatrace |
| unpack_json_cols | Unserialize data frame columns that contain JSON |
| unpack_json_cols.data.frame | Unserialize data frame columns that contain JSON |
| unpack_json_cols.data.table | Unserialize data frame columns that contain JSON |