It's not as awesome as free courses, but for those thinking of embarking on online courses, this may be helpful.
Copied and pasted from Open College website:
We have two special offers to help you get started on your life changing education journey. These offers are valid until 28 February, giving you every reason to start your studies now.
Offer 1:
Save up to 25%* on your course fee
Pay in full when you enrol online in any Open Colleges course and you could save thousands of dollars. Hurry! Offer ends at midnight on 28th February 2014.
Voucher code: XTRA
Offer 2:
$250/$500 discount off selected courses* (payment plans enrolments only)
Choose to pay for your course with a weekly, fortnightly or monthly payment plan, and you could save either $250 or $500 off selected courses. For eligible courses, see below.
Voucher code: FEB250 or FEB500
Offer 1 may not be quite as good as it sounds.
I couldn't find the fees list so I started the enrollment process to get to the payment step. The course I was inquiring about offered a 20% discount to pay upfront (i.e as standard without any voucher), then when the voucher was applied it dropped the price by only another 5%. The voucher only works when you pay full upfront so the voucher really only provides an extra 5% discount. This was on the course I checked anyway. Plus, it does say "up to 25% …" so it may be that discounts vary by course.