| appmon | A utility used to supervise Applications executing on several Erlang nodes |
| asn | Provides support for Abstract Syntax Notation One |
| compiler | A byte code compiler for Erlang which produces highly compact code |
| cosEvent | Orber OMG Event Service |
| cosEventDomain | Orber OMG Event Domain Service |
| cosFileTransfer | Orber OMG File Transfer Service |
| cosNotification | Orber OMG Notification Service |
| cosProperty | Orber OMG Property Service |
| cosTime | Orber OMG Timer and TimerEvent Services |
| cosTransactions | Orber OMG Transaction Service |
| crypto | Cryptographical support |
| debugger | A debugger for debugging and testing of Erlang programs |
| edoc | A utility used to generate documentation out of tags in source files. |
| erl_interface | Low level interface to C |
| et | Event Tracer (ET), uses the built-in trace mechanism in Erlang and provides tools for collection and graphical viewing of trace data. |
| gs | A Graphics System used to write platform independent user interfaces |
| ic | IDL compiler |
| inets | A set of services such as a Web server and a ftp client etc. |
| jinterface | Low level interface to Java |
| kernel | Functionality necessary to run the Erlang System itself |
| megaco | Megaco/H.248 is a protocol for control of elements in a physically decomposed multimedia gateway, enabling separation of call control from media conversion. |
| mnemosyne | Query language support for Mnesia DBMS |
| mnesia | A heavy duty real-time distributed database |
| mnesia_session | A foreign language interface to Mnesia DBMS |
| observer | Observer, tools for tracing and investigation of distributed systems |
| odbc | An interface to relational SQL-databases built on ODBC (Open Database Connectivity). |
| orber | A CORBA Object Request Broker |
| os_mon | A monitor which allows inspection of the underlying operating system |
| otp_mibs | SNMP management information base for Erlang/OTP nodes. |
| parsetools | A set of parsing and lexical analysis tools |
| pman | A process manager used to inspect the state of an Erlang system |
| runtime_tools | Runtime tools, tools to include in a production system |
| sasl | The System Architecture Support Libraries is a set of tools for release upgrades and alarm handling etc. |
| snmp | Simple Network Management Protocol (SNMP) support including a MIB compiler and tools for creating SNMP agents |
| ssl | An interface to UNIX BSD sockets with Secure Sockets Layer |
| stdlib | The Erlang standard libraries |
| syntax_tools | A utility used to handle abstract Erlang syntax trees, reading source files differently, pretty-printing syntax trees. |
| toolbar | A tool bar simplifying access to the Erlang tools |
| tools | A set of programming tools including a coverage analyzer etc |
| tv | An ETS and MNESIA graphical table visualizer |
| webtool | A tool that simplifying the use of web based Erlang tools |
| xmerl |