There are writer’s tool here, writer’s tools there, writer’s tools everywhere. The two tools that I use are WordPerfect and Jot+. I’ve used both of them for years and am very happy with them.
Writing means collecting and being able to find data and the faster and the easier the better. Our favorite tool for this a database program called Jot+. It’s a fantastic product, easy to use, and has a strong search capability that pops up what you search for first time every time. So, I like it and used it on my current book and it never let me down. Highly recommended.