Online Schools Report has created a guide to help college students organize their studies. It includes a bunch of organizational apps, note-taking apps, brainstorming apps, and productivity apps to cover each aspect of studying. However, upon reading it, I realized most of these would be pretty useful for authors, too. Just another way writing keeps us young, I guess!
You can see the Infographic below but I suggest you take a look at the original post, which has everything broken down in easy-to-read segments.