Komodo Edit is a free, open source editor from dynamic language experts.
It's absolutely fantastic to work with. It does everything a good editor should do, but it also adds a bunch of other little awesome things."
-Dan Hulton, www.danhulton.com
* All the languages: Dynamic language expertise for Perl, PHP, Python, Ruby, and Tcl, plus JavaScript, CSS, HTML, and XML, and template languages like RHTML, Template-Toolkit, HTML-Smarty and Django.
* All the platforms: Windows? Mac? Linux? Yes! Yes! Yes!
* Award-wining tools: Everything you'd expect from an editor based on the award-winning Komodo IDE, like autocomplete and calltips, multi-language file support, syntax coloring and syntax checking, Vi emulation, Emacs key bindings, and more.
* Firefox-style extensibility: Go ahead, hack away! Or download some of the cool extensions from member of the Komodo community.
Autocopy - The name pretty much says it all. Instead of having to hit cmd+c (or ctrl + C for our Windows readers), every time you highlight text it automatically copies it to the clipboard. If you don’t want it on 100% of the time, you can toggle it on and off in the bottom-right of the browser.
Well, in the X Window system that's default behaviour. Don't need an extension for that.
Scrapbook - Much like the Read it Later extension, Scrapbook allows you to quickly save pages for later reading. However, it has a few more great features, like taking whole snippets of pages (like Google Notebook), searching within snippets, saving whole websites, and you can even organize the snippets like bookmarks. Perfect for researching or in-depth bookmarking.
Copy Plain Text- The name pretty much says it all. If you do a lot of writing in WYSIWYG editors (blogging and other word processors), then this extension can come in pretty handy. Copy Plain Text will leave all the bolds, italics and other unwanted formatting when you copy and paste into text fields.
FEBE - On the surface, FEBE will quickly and easily backup your Firefox extensions. But the fun doesn’t stop there. You can also sync multiple computers with the same Firefox extensions, and even set up automatic backups, ensuring that you’ll never lose your Firefox configurations again.
del.icio.us bookmarks - Save, search and share your Del.icio.us bookmarks easily inside of Firefox. Browsing your bookmarks is especially easy with the del.icio.us sidebar.