Ideation: I brainstorm a lot while I walk so I use a Stickynotes App to write down ideas so that they aren’t lost to memory (which is a constant threat).
Articles: Good ol'Grammarly. I also use Natural Readers because I get a sore throat from reading out loud too much while editing (which is a must). I have the automated voice read it out loud to me while I follow along making edits. They have a free trial version that is easy and generous with usage.
Ghostwriting: Scrivener has been a godsend because interviewing clients and their contacts produces this chaotic set of stories and information. Being able to organize that information into chunks to later reassemble has been essential for producing the final book.