Hoplax is a power user tool to store bookmarks in text files and manage them efficiently. Bookmarks stored in Hoplax are easy to edit and search with normal Unix tools and editors. They are easy to synchronize with git/svn/darcs/etc. Bookmarks can be categorized easily into files, and you can choose to not synchronize a file to a computer, e.g. confidential company bookmarks to home computers. The filtering is smarter than the browser's location bar. Keyword bookmarks with multiple parameters and auto-completion are supported.
Bioloide is a graphical Web-based interface with several tools for checking various aspects of your Web sites, for users, yourself, and search engines. It is extensible and currently includes auto RSS, RSS editor, Adsense and Analytics check, gallery generator, last modified files, and Zip generator tools.
Uhura is a Web console for databases. It works with MySQL, PostgreSQL, and FirebirdSQL. It presents trees that let you browse databases, tables, columns, constraints, triggers, views, and procs. It has panels for history and fragments. Its editor features autocompletion and autoindenting. It is easy to install.