DbDesigner: A visual database designer suitable for designing complex database models.
KDE-DB: Was KDB. Set of libraries to minimize the effort needed to develop database applications for KDE.
Kexi: An integrated environment for managing data. It helps in creating database schema, inserting, querying and processing data. Part of KOffice.
Kexi: An integrated environment for managing data. It helps creating database schemas, inserting, querying and processing data. Screenshots, downloads, resources, a wiki and a list of involved developers.
kmysqladmin: A software, written with QT and KDE, to manage mysql-servers.
knoda: Knorr's Datenbank, a database frontend for KDE under Linux. It is based on hk_classes. News, documentation, screenshots, changelog, FAQ and a mailinglist for discussions.
KPGsql: A frontend for the database system postgresql.
KSql: Previously known as KMySql, KSql is a KDE database client.
KSqlPlus: An interface to the terminal application Oracle SQL*Plus. KSqlPlus imitates the Oracle SQL Worksheet for Windows.
Kuery for MySQL: Tries to offer a GUI for MySQL administration. The UI superficially resembles portions of Microsoft's Enterprise Manager for SQL Server. Description, discussion and software download.
MySQL Navigator: A MySQL GUI client.
Novinyl: A lightweight desktop database for KDE. It only supports flat data, no SQL or even simple linked data.
Rekall: A Database Management System for KDE.
TOra: A Toolkit for Oracle to perform Oracle Administrative Tasks in KDE.