What's the best real estate procedures (SOPs) app?

[Marie M.]

I am removing PMI from a property. I have done this many times in the past. I would like to leave some notes for myself and info on this topic for the next time I or someone else on my team does it, along with a hundred other tasks.
What are some great SOPs/checklists for real estate business processes? 

Our main company has always used spreadsheets and word processors in a shared data hosting system but there must be some cool apps that make this more fun and easy.