PostGIS Pre-built distributions for various OS

CentOS, Scientific Linux, Redhat El, Fedora

​PostgreSQL Yum Repo managed by Devrim Gunduz is the best source for both PostgreSQL and PostGIS binaries

PostGIS 2.0

• ​PostgreSQL 9.1

CentOS 6 PostgreSQL 9.1 Instructions

PostGIS 1.5

• ​PostgreSQL 9.0

​Yum PostGIS 1.5 on PostgreSQL 9.0 Instructions

Windows

PostGIS 2.1

​Experimental Builds

These are built for PostgreSQL 8.3-9.2 manually for both 32/64bit whenever any major changes

PostGIS 2.1 buildbot builds

• ​PostgreSQL 9.2 (32-bit and 64-bit)
• ​PostgreSQL 9.1 (64-bit)
• ​PostgreSQL 9.0 (64-bit)

PostGIS 2.0

Available on EnterpriseDb Application StackBuilder after you download ​PostgreSQL 8.4-9.1 Installers

You can also download the PostGIS installers and binaries for use with EDB directly from ​PostGIS Installers and Binaries installers and binaries are uploaded here before they are deployed on stackbuilder