1. Freebie McGill Rhyming dictionary
2. Several online rhyming dictionaries and tools, specifically recall a dillfrog domain name
3. Trello in iOS for organizing thoughts and phrases, then PC version when I'm at my DAW
4. Google docs for cross globe collaboration
5. Notes app in iOS for voice memos when I don't have a pen and paper with me (but I always have my phone. Weird how that works)
6. Camera app in phone to capture inspiring images