Kexi

Rapid Application Development, for handling your database needs

Full visual designers for tables, queries and forms
Running queries, support for parametrized queries
Supports query design in dedicated SQL view
Designing and displaying relational data using combo boxes (lookup columns)
Direct data entry or import using CSV
Locked down User Mode, allowing you to switch off all commands related to editing your project's design
Many more features

Read more and see many more screenshots on the project's pages.