DBAN is the way to do it but for a quick easy way to do USB drives and SD Cards then try…

http://www.diskwipe.org/download.php

https://emcosoftware.com/ping-monitor/download

Seems pretty good for network troubleshooting, first 5 hosts free.

http://rufus.akeo.ie/

http://www.hiren.info/pages/bootcd

http://download.cnet.com/JDs-Auto-Speed-Tester/3000-2648_4-75447312.html

https://ninite.com/

http://www.totusoft.com/lanspeed.html

http://www.sourceforge.net/…..

http://www.nirsoft.net/utils/blue_screen_view.html#DownloadLinks