In October (from what I remember) Facebook will require HTTPS connections to pages and app's that are hosted away from Facebook. At the moment, it comes up with a popup saying "do you want to turn secure browsing off". I think (as far as I know) that once October comes people won't be able to access these pages any more.

Now, I know you have to pay for good SSL certificates. However, for a lot of clients this is just going to be a Facebook page, and not mission critical to their businesses. With this in mind, they may not want to pay for an SSL certificate.

I was wondering if there are any free SSL certificates that could do the job? Even if there are no free ones, are there any cheap alternatives?

Also, if you do use a free certificate, will it still work in the same way as a paid for certificate?