Grammar Cheat Sheet — From ProWritingAid
Passive and Active Voice: Watch the video, read the post, and make sure you scroll to the end and download the PDF.
Title Capitalization Tool — Includes tabs so you can select the styleguide you’re using.
Commas get their own section because they drive everyone crazy and need singling out.
Comma: an excellent article on how to use the comma.
Extended rules for using commas.