An Online Bibliography creator, allowing you to create citations and export them. Also some great tips on what makes a reliable source.
EasyBib
Will help you cite in MLA 8, MLA 7, APA, Chicago and more for a variety of formats (Print, Web, Multimedia) etc. Create and export your citations easily.
Cite Fast
Another option for no fuss, no muss Bibliography creation. Allows APA, MLA 7 and 8, Chicago and deals with a variety of text formats.
Plagiarism Checker
Grammarly
A Chrome extension that can check your writing for plagiarism, spelling and grammar mistakes and other writing issues.