Various programs designed to handle specific tasks.  Freeware for anyone to download.

Also see software reviews for other free and commercial software

Screenshots

QUICK CALC - freeware

As an improvement over the standard Windows calculator, Quick Calc has the ability to remain on top of other programs, and also features a running tape of your calculations.
The tape contents can also be copied to the clipboard.
It can be operated from the keyboard using the numeric keypad.
Features all the functionality you would expect in a standard calculator.
Does not require installation - simply download the program and launch it from any location.

Download  quickcalc.exe  170kb

EMAIL OBSCURER - freeware

Spammers can easily grab any email address from a website if it is shown in the normal way.  You can make your email addresses harder to steal, by using Email Obscurer.  It translates an email address into codes which will be useless to spammers, but will still work properly when you click on them.

Download  emailobscurer.exe  470kb