Mental test
This program (written in Visual basic) has been freely available at Mathsnet.net for some time. It features variable difficulty, variable time limit, summary scores, print out your results, practise or test, more than 10 different activities, diagnosis of errors, Fizz Buzz, negative numbers, estimation, extensive help fully integrated.

The material is provided in one zipped file, which should be unzipped using WinZip, or similar and put in a folder on the purchaser's own computer for their own use. If a network licence has been purchased then these materials can be installed on the purchaser's network or intranet.

This program is free to download.