Fav-Links - Free bookmark manager helps user to manage bookmarks in a simple and effective way. Based on website thumbnails gives clear picture of stored content. Hot keys combinations allows to call bookmark manager when it needed.
LinkLocker - LinkLocker is a lightweight bookmarking service with an emphasis on privacy.
Linkman - Linkman Pro allows for managing large amount of URLs in its own database.
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
Tidyfavorites - User-friendly app for your favorite bookmarks.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community