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Yes, you can get any number of free personal certificates from Thawte community.
http://www.thawte.com/email/
You have to join, and produce evidence of who you are - from memory, a long time back, I used my National Insurance Number. Thereafter you can get as many certificates as you like. If you want your name etc. in the certificates, you need to use the Web of Trust, but you can get Personal Freemail certificates without that.