About custom fields

Hello,

At this page http://www.technologymag.net/vi/, theme author have added custom fields for display label at the post title.

I'm just simple using like that:
- Write "special_content" in the name field
- Write either "Photo", "Video" or "Review"

Is there anyway to using this feature for my another page?

p/s: i found around some plugins but it seems non-plugin works like that.

Thanks,
Tuan.