ZoteroBib allows you to create citations quickly and for free using URLs and other identifying information. With ZoteroBib, you can:
While Calvin College’s KnightCite citation creator only covers MLA 8, APA, and Chicago, it provides forms to help you make citations for a wide range of resources in print, online, and in multimedia and communication.
That means this tool will not only help you cite a book, article, or website, it can help you cite a cartoon, advertisement, musical composition, radio or TV program, email, and more.
MyBib is a free online service that allows users to generate citations and bibliographies. It has a clean look and feel. You can paste in a DOI or URL and have the fields populate automatically. MyBib is new, continually updated, and currently free to use.