Qt 5.3 is a major update to the Qt5 tool-kit.

Qt 5.3 Linux & Open-Source News

KDE Frameworks 5.13.0 Released   KDE   2015-08-13
LXQt 0.9 Released, Now Requires Qt5 & KDE Frameworks 5   Qt   2015-02-08
Qt 5.3.2 & Qt Creator 3.2.1 Released   Qt   2014-09-16
New Features Coming For Qt 5.4   Qt   2014-06-26
Qt 5.3.1 Officially Released   Qt   2014-06-25
Ubuntu 14.10 Will Target Qt 5.3 Support   Ubuntu   2014-05-20
Qt 5.3 Has Been Officially Released   Qt   2014-05-19
Qt 5.3 Will Hopefully Be Released Early Next Week   Qt   2014-05-16
Qt 5.3 Is Near With Today's Release Candidate   Qt   2014-05-09
Qt 5.3 Release Candidate Planned For End Of Week   Qt   2014-04-30
The Best Features Coming With Qt 5.3   Qt   2014-04-22
Qt Creator 3.1 RC1 Released, Qt 5.3 Advances   Qt   2014-04-04
Digia Works On Getting Qt 4.8.6 Out The Door   Qt   2014-03-31
Qt 5.3 Beta Released -- Improves Android, Adds WebSockets   Qt   2014-03-25
Qt 5.3 Alpha Released   Qt   2014-02-27
Exciting Features Coming For Qt 5.3   Qt   2014-02-27
Qt5 To Most Likely Stick With Time-Based Released   Qt   2014-02-25
Qt5 Is Still Being Decided Upon For Ubuntu 14.04 LTS   Qt   2014-01-17
Qt 5.3 Feature Freeze Is In Less Than One Month   Qt   2014-01-16
Qt 5.3+ To Have Printing Support Improvements   Qt   2014-01-07
Digia Is Planning Enginio Cloud Data Storage For Qt 5.3   Qt   2014-01-06
A Qt5 Opera-Inspired Browser To Ring In The New Year   Qt   2013-12-31
Digia Officially Releases Qt 5.2   Qt   2013-12-12
Qt 5.3 To Focus On Performance, Stability   Qt   2013-12-06
Qt 5.3 Might Depend On SSE2 CPUs   Qt   2013-11-11
The State Of Qt On Android, Already Plans For Qt 5.3   Qt   2013-10-26