| compiler 7.6.9.1 | A byte code compiler for Erlang which produces highly compact code | 
| erts 11.2.2.8 | Functionality necessary to run the Erlang System itself | 
| kernel 7.3.1.4 | Functionality necessary to run the Erlang System itself | 
| sasl 4.0.2 | The System Architecture Support Libraries is a set of tools for release upgrades and alarm handling etc. | 
| stdlib 3.14.2.2 | The Erlang standard libraries | 
| mnesia 4.19 | A heavy-duty real-time distributed database | 
| odbc 2.13.3.1 | An interface to relational SQL-databases built on ODBC (Open Database Connectivity). | 
| os_mon 2.6.1 | A monitor which allows inspection of the underlying operating system | 
| snmp 5.8.0.1 | Simple Network Management Protocol (SNMP) support including a MIB compiler and tools for creating SNMP agents | 
| asn1 5.0.15.1 | Provides support for Abstract Syntax Notation One | 
| crypto 4.9.0.2 | Cryptographical support | 
| diameter 2.2.4 | Diameter | 
| eldap 1.2.9 | eldap - Erlang LDAP library | 
| erl_interface 4.0.3.1 | Low level interface to C | 
| ftp 1.0.5 | FTP client | 
| inets 7.3.2.2 | A set of services such as a Web server and a ftp client etc. | 
| jinterface 1.11.1 | Low level interface to Java | 
| megaco 3.19.5.1 | Megaco/H.248 is a protocol for control of elements in a physically decomposed multimedia gateway, enabling separation of call control from media conversion. | 
| public_key 1.10.0.1 | API to public key infrastructure. | 
| ssh 4.11.1.4 | Secure Shell application with sftp and ssh support | 
| ssl 10.3.1.2 | ssl- Secure Socket Layer. | 
| tftp 1.0.2 | TFTP application | 
| wx 1.9.3.1 | A Graphics System used to write platform independent user interfaces | 
| xmerl 1.3.27 | Provides support for XML 1.0 | 
| debugger 5.0 | A debugger for debugging and testing of Erlang programs | 
| dialyzer 4.3.1.1 | The DIALYZER, a DIscrepancy AnaLYZer for ERlang programs. | 
| et 1.6.4 | Event Tracer (ET), uses the built-in trace mechanism in Erlang and provides tools for collection and graphical viewing of trace data. | 
| observer 2.9.5 | Observer, tools for tracing and investigation of distributed systems | 
| parsetools 2.2 | A set of parsing and lexical analysis tools | 
| reltool 0.8 | Reltool is a release management tool. It analyses a given Erlang/OTP installation and determines various dependencies between applications. The graphical frontend depicts the dependencies and enables interactive customization of a target system. The backend provides a batch interface for generation of customized target systems. | 
| runtime_tools 1.16.1 | Runtime tools, tools to include in a production system | 
| syntax_tools 2.5 | A utility used to handle abstract Erlang syntax trees, reading source files differently, pretty-printing syntax trees. | 
| tools 3.4.4 | A set of programming tools including a coverage analyzer etc | 
| common_test 1.20.2.2 | A portable framework for automatic testing | 
| eunit 2.6 | Support for unit testing. | 
| edoc 0.12 | A utility used to generate documentation out of tags in source files. | 
| erl_docgen 1.0.2 | A utility used to produce the OTP documentation. | 
| hipe 4.0.1 | High Performance Erlang |