KDE e.V.
Haruna
FreeHaruna: A decent, open-source media player for Windows
Windowskturtle
FreeKTurtle: An Intuitive Programming Tool for Education
Windowskdevelop
FreeComprehensive IDE for Multiple Programming Languages
WindowsGlaxnimate
FreeComprehensive Vector Animation Tool for Windows
WindowsBlinken
FreeEnhance Your Memory with Blinken Game
WindowsUmbrello
FreeComprehensive UML Modelling Tool for Windows
WindowsKontact
FreeKontact: A Linux Powerhouse for Personal Info
WindowsKTrip
FreeEfficient Public Transport Navigation Tool
WindowsKarp
FreeKarp: Does the job for basic PDF wrangling on Windows
Windowsbovo
FreeBovo: Simple Gomoku fun, but needs more features
Windowskirigami-gallery
FreeKirigami Gallery: A decent widget showcase, if you use Kirigami
Windowsmerkuro
FreeComprehensive Calendar and Contact Management Tool
WindowsKiten
FreeComprehensive Japanese Language Study Tool
WindowsRuqola
FreeRuqola: A Feature-Rich Rocket.Chat Client
WindowsNeoChat
FreeComprehensive Matrix Client for Secure Messaging
Windowskbruch
FreeKBruch: A Comprehensive Fraction Practice Tool
Windowsmarknote
FreeEfficient Note-Taking with Marknote
WindowsKonsole
FreeComprehensive Overview of Konsole Terminal Emulator
Windowsakregator
FreeAkregator: A decent, no-frills RSS reader for Windows folks
WindowsKile
FreeKile: A LaTeX editor that doesn't make you scream
WindowsRKWard
FreeRKWard: A decent R IDE, but is it enough?
WindowsMarknote
FreeMarknote: A decent, free, basic document manager for Macs
MacKonversation
FreeFeature-Rich IRC Client for Windows
WindowsLokalize
FreeEfficient Localization Tool for Translation
Windows
