KDE 4.13 (Final) is now available. Here the announcement:

The KDE Community proudly announces [1] the latest major updates to KDE
Applications delivering new features and fixes. Major improvements are made to
KDE's Semantic Search technology, benefiting many applications. With Plasma
Workspaces and the KDE Development Platform frozen and receiving only long
term support, those teams are focusing on the transition to Frameworks 5. This
release is translated into 53 languages; more languages are expected to be
added in subsequent monthly minor bugfix releases.

KDE Applications 4.13 Benefit From The New Semantic Search [2], Introduce New
Features

The KDE Community is proud to announce the latest major updates to the KDE
Applications delivering new features and fixes. Kontact (the personal
information manager) has been the subject of intense activity, benefiting from
the improvements to KDE's Semantic Search technology and bringing new
features. Document viewer Okular and advanced text editor Kate have gotten
interface-related and feature improvements. In the education and game areas,
we introduce the new foreign speech trainer Artikulate; Marble (the desktop
globe) gets support for Sun, Moon, planets, bicycle routing and nautical
miles. Palapeli (the jigsaw puzzle application) has leaped to unprecedented
new dimensions and capabilities. read the announcement [3].

[1] http://kde.org/announcements/4.13/
[2] http://dot.kde.org/2014/02/24/kdes-next-generation-semantic-search
[3] http://kde.org/announcements/4.13/applications.php

  KDE 4.13 released