The current TeamCity version is 6.5.1, it can be downloaded from the download page.
Below is a list of previous TeamCity releases.
TeamCity 6.5
Build: 17795
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 6.0.3
Build: 15925
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 6.0.2
Build: 15857
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 6.0.1
Build: 15816
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 6.0
Build: 15772
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 5.1.5
Build: 13602
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 5.1.4
Build: 13550
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 5.1.3
Build: 13506
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 5.1.2
Build: 13430
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 5.1.1
Build: 13398
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 5.1
Build: 13360
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 5.0.3
Build: 10821
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 5.0.2
Build: 10784
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 5.0.1
Build: 10715
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 5.0
Build: 10669
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 4.5.6
Build: 9140
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 4.5.5
Build: 9103
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 4.5.4
Build: 9071
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 4.5.3
Build: 9035
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 4.5.2
Build: 9029
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 4.5.1
Build: 8975
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 4.5
Build: 8944
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 4.0.2
Build: 8222
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 4.0.1
Build: 8171
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)
TeamCity 4.0
Build: 8080
Windows installer
Archive with bundled Tomcat (any platform)
Java EE container (war)