At first I was a bit put off because the software didnt seem to have bookmarking capabilities. After a bit more exploring, I found out that it does,essentially, have this feature. The software gives you the ability to highlight verses with various colors. If you give each color a category name (sin, salvation, prophecies, etc) then you can search by color. All the verses that are highlighted in yellow for instance will show up in the listing.
I only wish it had access to more translations. Other than that its a great piece of software in my prime bible reference that I now use all the time.
Happyslave about Blue Letter Bible, v2.43