Is math type free?

I'm curious about the pricing of math type software. Is it a free tool, or do I need to purchase a license to use it? Are there any limitations or restrictions that come with using the free version, if it exists? And if I do decide to purchase a license, what are the benefits and features that I can expect to gain access to? Additionally, are there any alternatives to math type that I should consider, perhaps with different pricing structures or capabilities?