Provide two options to viewing Forms on the main page
1. By collapsible and expandable categories
2. By category folders that you enter (clicking on it) and exit (clicking on the back button)
The way iDB does this looks quite good. An initial icon view allow you to drill down into Notes, Accounts, Cards, Files etc. I'm guessing most users will want to customise the categories to their liking but files and notes will likely be common?
The other screenshot from iDB that looked useful was the one with a little padlock symbol next to the DBs that are encrypted.