Test data generator TDG 

TDG allows you to generate mass data and test data in databases. TDG reads the structure of database tables. You only need to enter your data descriptions in order to receive the desired amount of records. These records can be generated on the spot.
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WAPT 

WAPT is a load and stress testing tool for web sites and intranet applications with web interface. Accurate load simulation, run-time test data generation, recording and playback of secure HTTPS requests, clear graphs and reports, and more.
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DataGen 

Datagen makes it possible to insert meaningful testdata into any database you can connect to with ADO.
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