By: Nick

Hi Nadia, MyPortfolio http://myportfolio.school.nz is a free eportfolio option provided to schools in NZ at no cost. For more information regarding MyPortfolio head over to https://sites.google.com/site/myportfolionz/ or the MyPortfolio FAQs http://myportfolio.school.nz/support.php#what-is-myportfolio.
In regard to your question, are there any other free options available? Absolutely, a number of schools in NZ are using combination of google docs and sites to document evidence and ongoing progress towards RTC, appraisal and teaching as inquiry. Lots of evidence too of teachers using blogs for the same purpose. Any of the options have their own pros and cons, it is really over to you what this may look like. I can put you in touch of some teachers who have examples they could share with you. Let me know.
Cheers, Nick