Bluefish is a powerful editor for experienced web designers and programmers. Bluefish supports many programming and markup languages, but it focuses on editing dynamic and interactive websites."One of the most powerful editors for Linux + Supports many programming and markup languages + Lots of time saving tools for experienced users + Friendly enough for beginners + Its wealth of features will make your programming easier + While letting you maintain control over your code"

Bluefish Features
Fast - Bluefish loads complete websites within a second.
Multiple document interface, easily opens 500+ documents (tested 3500 documents simultaneously)
Project support, enables you to work efficiently on multiple projects
Support for remote files using gnome-vfs (depending on your gnome-vfs setup, you'll have FTP, SFTP, HTTP, HTTPS, WebDAV, Samba and more)
Customizable syntax highlighting based on Perl Compatible regular expressions, with subpattern support and default patterns for
HTML, PHP, C, Java, JavaScript, Java server pages, (JSP), SQL, XML, Python, Perl, Cascading stylesheets, (CSS), ColdFusion, Pascal, R ,Octave/Matlab,
Anti aliased text window
Nice wizards for startup, tables, frames, and others
Dialogs for many HTML tags, with all their attributes
Auto tag closing for HTML and XML documents
Escape functions for HTML and XML documents.