Similar wiki-style programs are Zim (based on GTK and Python), Wixi (based on Python and GTK), KeepNote (based on Python and GTK), Notecase (based on GTK), BasKet (based on Qt), Gnudiary (also based on Qt), Tomboy (GTK, based on Mono), Gnote (Tomboy port to C++) and Tiddlywiki (self-modifying, single-HTML contained personal wiki, written in JavaScript and expandable with plugins). Also Treeline, an advanced outliner written in Python and personal database available for Linux and Microsoft Windows, has similar functions. Other components Notes: KNotes – KDE Notes Management Weather: KWeather Storage back-end Along with the KDE Software Compilation 4 life cycle, Kontact moved to Akonadi for storing its data, when in the past every Kontact component implemented the storage technologies itself. Akonadi is currently mostly developed by the KDE PIM team, but its design is done in an agnostic way and thus not depending on KDE technologies. The first SC 4 release of Kontact was officially shipped with KDE 4.1. That release did not use Akonadi. Since then the Kontact components have been gradually migrating towards Akonadi. The first stable version of KDE PIM using Akonadi was released together with KDE 4.6.4 in June 2011. See also List of personal information managers David Vignoni, the designer of older icons References External links Email clients that use Qt Free email software Free note-taking software Free personal information managers Instant messaging clients that use Qt KDE Applications Kdepim