A simple calculator made up with Ms Access using VBA, you can use it for doing simple calculations for Forms in Ms Access, you can also put the result of the calculation in any targeted text box using a custom function available with the sample database.
No installation, just copy and paste the code module and form. Extremely easy to use.
When first installed, hitting 7 on the calculator types an 8. This is easily fixed in the code, but would be nice if the download was corrected. Also if hitting enter would return the calculation to the desired field (instead of having to click the button with the mouse) it would be more streamlined to use.