For memory testing I use the free memtest86 (http://www.memtest86.com/).

You can download either an Iso or floppy disk image and then boot from the cd or floppy to run it.

There is also memtest86+  (http://www.memtest.org/) which does the same thing.

After evaluating PHPStorm/PyCharm/IntelliJ IDEA and Wingware IDEs I have now bought IntelliJ IDEA at 40% off. Although IntelliJ includes PHPStorm and PyCharm they are a little out of step, with the language specific IDEs being slightly ahead. So, for example, whilst Python remote debugging works in PyCharm it currently doesn't in ItelliJ IDEA with the PyCharm plug-in. There are several other minor differences as a result of PyCharm/PHPStorm being built with later releases of the core IntelliJ platform.

I really liked Wing IDE with it's major plus points for me being the debugger and Mako template support but in the end the multi language support and 40% discount won the day.

I should have given this the title JetBrains IDEs up to 50% off until 30th April 2011.