I am going to a scientific conference in Croatia. I saw on the website that if I am a Russian citizen but go to Croatia for educational, scientific or cultural issues I still require a visa but it will be free. Is this information valid?
Yes, VFS Global handles the visa to Croatia in Russia. The only thing is that you cannot stay there for more than 90 days. The website clearly states:
Visa Fees waived categories
Members of the immediate family of a Croatian, EU and EEA citizens (spouse and children)
If you plan to go to Croatia to some visit for a period not to exceed 90 days and your country is not on the visa-free list, you need a other visa (Visa C).