| autoinc | Functions for autoincrementing fields | ❌ |
| amcheck | Functions for verifying relation integrity | ❌ |
| bloom | Bloom access method - signature file-based index | ❌ |
| bool_plperl | Transform between bool and plperl | ❌ |
| btree_gin | Support for indexing common datatypes in GIN | ❌ |
| btree_gist | Support for indexing common datatypes in GiST | ❌ |
| citext | Data type for case-insensitive character strings | ❌ |
| cube | Data type for multidimensional cubes | ❌ |
| dict_int | Text search dictionary template for integers | ❌ |
| dict_xsyn | Text search dictionary template for extended synonym processing | ❌ |
| earthdistance | Calculate great-circle distances on the surface of the Earth | ❌ |
| fuzzystrmatch | Determine similarities and distance between strings | ❌ |
| hstore | Data type for storing sets of (key, value) pairs | ❌ |
| hstore_plperl | Transform between hstore and plperl | ❌ |
| insert_username | Functions for tracking who changed a table | ❌ |
| intagg | Integer aggregator and enumerator (obsolete) | ❌ |
| intarray | Functions, operators, and index support for 1-D arrays of integers | ❌ |
| isn | Data types for international product numbering standards | ❌ |
| jsonb_plperl | Transform between jsonb and plperl | ❌ |
| lo | Large object maintenance | ❌ |
| ltree | Data type for hierarchical tree-like structures | ❌ |
| moddatetime | Functions for tracking last modification time | ❌ |
| pgcrypto | Cryptographic functions | ❌ |
| pgrowlocks | Show row-level locking information | ❌ |
| pgstattuple | Obtain tuple-level statistics | ❌ |
| pg_buffercache | Examine the shared buffer cache | ✅ |
| pg_freespacemap | Examine the free space map (FSM) | ❌ |
| pg_prewarm | Prewarm relation data | ❌ |
| pg_stat_statements | Track execution statistics of all SQL statements executed | ✅ |
| pg_trgm | Text similarity measurement and index searching based on trigrams | ❌ |
| pg_visibility | Examine the visibility map (VM) and page-level visibility info | ❌ |
| plperl | PL/Perl procedural language | ❌ |
| plpgsql | SQL procedural language | ✅ |
| postgres_fdw | Foreign data wrappers | ✅ |
| refint | Functions for implementing referential integrity (obsolete) | ❌ |
| seg | Data type for representing line segments or floating-point intervals | ❌ |
| sslinfo | Information about SSL certificates | ❌ |
| tablefunc | Functions that manipulate whole tables, including crosstab | ❌ |
| tcn | Trigger change notifications | ❌ |
| tsm_system_rows | TABLESAMPLE method which accepts the number of rows as a limit | ❌ |
| tsm_system_time | TABLESAMPLE method which accepts the time in milliseconds as a limit | ❌ |
| unaccent | Text search dictionary that removes accents | ❌ |
| uuid-ossp | Generate universally unique identifiers (UUIDs) | ❌ |
