What are some alternatives?
When comparing Auto-Sort Bookmarks and Bookmarks Clean Up, you can also consider the following products
SuperSorter - Clean up your bookmark mess!
BookmarkApp - BookmarkApp is a bookmark duplicate cleaner and unique and useful tool for organizing bookmarks in...
Fast Bookmark Scanner II - Scan your bookmarks in order to delete duplicated links empty folders or merge duplicated folders.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Recursive Bookmark Sorter - Sort your bookmarks recursive
LinkCollector - Bookmark manager.