PostGIS Pre-built distributions for various OS

CentOS

PostGIS 2.0

PostgreSQL Yum Repo

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)