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 * [PostGIS](http://postgis.net/) - Spatial and Geographic objects for PostgreSQL.
 * [PG\_Themis](https://github.com/cossacklabs/pg_themis) - Postgres binding as extension for crypto library Themis, providing various security services on PgSQL's side.
 * [zomboDB](https://github.com/zombodb/zombodb) - Extension that enables efficient full-text searching via the use of indexes backed by Elasticsearch.
+* [pgMemento](https://github.com/pgMemento/pgMemento) - Provides an audit trail for your data inside a PostgreSQL database using triggers and server-side functions written in PL/pgSQL.
 
 ### Optimization
 * [PgHero](https://github.com/ankane/pghero) - PostgreSQL insights made easy.
 * [pgtune](https://github.com/gregs1104/pgtune/) - PostgreSQL configuration wizard.
-* [pgtune](http://pgtune.leopard.in.ua/) - Online version of PostgreSQL configuration wizard.
-* [pgconfig.org](https://www.pgconfig.org/) - PostgreSQL Online Configuration Tool (also based on pgtune).
+* [pgtune](https://github.com/le0pard/pgtune) - Online version of PostgreSQL configuration wizard.
+* [pgconfig.org](https://github.com/sebastianwebber/pgconfig) - PostgreSQL Online Configuration Tool (also based on pgtune).
 * [PoWA](http://dalibo.github.io/powa/) - PostgreSQL Workload Analyzer gathers performance stats and provides real-time charts and graphs to help monitor and tune your PostgreSQL servers.
 
 ### Utilities