We all have old PCs! They sit around, sometimes gathering dust, or possibly being used for a specific purpose. If you want to dispose of one, then you should know how to recycle an old PC correctly. But, before you do recycle, Jake can give you some good ideas on other ways your PC can be re-purposed.
File/folder secure erase (Win): http://eraser.heidi.ie/
File/folder secure erase (Win, Mac, Linux): http://www.killdisk.com/eraser.htm
Whole disk wipe (all): http://www.dban.org/
OwnCloud file storage and data backup: https://owncloud.org/
Plex media server: https://plex.tv
Kodi media server: https://kodi.tv
Music courtesy of 8 Bit Weapon: www.8bitweapon.com.