Qt 4 versions

Latest major Qt 5.x versions are available at Qt Downloads. Information about Qt 5.x releases can be found at Releases page.

Latest major Qt 4.x versions

Qt version	Source code	Binary	Changes	What's new
4.0.1	Mac, Win, X11		4.0.1	4.0
4.1.5	Mac, Win, X11		4.1.0, 4.1.1, 4.1.2, 4.1.3, 4.1.4, 4.1.5	4.1
4.2.3	Mac, Win, X11		4.2.0, 4.2.1, 4.2.2, 4.2.3	4.2
4.3.5	all platforms		4.3.0, 4.3.1, 4.3.2, 4.3.3, 4.3.4, 4.3.5	4.3
4.4.3	all platforms	Mac (carbon), Win (MinGW)	4.4.0, 4.4.1, 4.4.2, 4.4.3	4.4
4.5.3	all platforms	Mac (carbon), Mac (cocoa), Win (MinGW)	4.5.0, 4.5.1, 4.5.2, 4.5.3	4.5
4.6.4	all platforms	Mac (carbon), Mac (cocoa), Symbian 4.6.3, Win (MinGW), Win (VS2008)	4.6.0, 4.6.1, 4.6.2, 4.6.3, 4.6.4?	4.6
4.7.4	all platforms	Mac (carbon) 4.7.3, Mac (cocoa), Symbian (S60) 4.7.1, Win (MinGW), Win (VS2008)	4.7.0, 4.7.1, 4.7.2, 4.7.3, 4.7.4	4.7
4.8.7	all platforms	Mac (cocoa), Win (MinGW), Win (VS2008), Win (VS2010)	4.8.0, 4.8.1, 4.8.2, 4.8.3, 4.8.4, 4.8.5, 4.8.6, 4.8.7	4.8

Ancient Qt versions

All Qt releases from 1.41 onward to the current version can be found on Qt Downloads Archive.

Qt SDKs providing major 4.x versions

SDK version	Qt version	Qt Creator version	Download
2009.04	4.5.3	1.2.1	Linux (32-bit), Linux (64-bit), Mac, Win
2010.04	4.6.3	2.0.0	Linux (32-bit), Linux (64-bit), Mac, Win
2010.05	4.7.0	2.0.1	Linux (32-bit), Linux (64-bit), Mac, Win
1.1	4.7.3	2.1.0	Linux (32-bit), Linux (64-bit), Mac, Win
1.1.4	4.7.4	2.3.1	Linux (32-bit), Linux (64-bit), Mac, Win

Major Qt 4.x versions after-release blog posts

Qt version	Post(s)
4.1	printing and WYSIWYG, Qt 4.1 rocks!
4.2	Qt 4.2.0 released
4.3	Qt 4.3.0 released
4.4	Qt 4.4.0 fully released
4.5	Qt 4.5 hits the (virtual) shelves
4.6	Qt 4.6.0 Released Early due to Good Behaviour
4.7	Qt 4.7.0 now available
4.8	Qt 4.8.0 Released