I supported some development of Synergy a while ago and they sent me some codes for lifetime access. It's nice software; it allows you to treat multiple computers as one, moving your mouse from the screen of one machine and onto the other. It's kind of like KVM software.

Official Website: http://synergy-project.org/
Page to Redeem Codes: http://synergy-project.org/download/

Codes:
6T5O9OEG
V9LEJIQF
HYS99UZP
XVNAPXM7
291ZZ3XW
N8VNO45J
M483N9V8
XMOU1T0E
OO01JU95
2F5BG896

If you use a code, or try to use one and find that is has already been redeemed, please post a reply here so that I can remove it from the list.