In addition to the Lasso Studio products, there are a number of popular third party editors and IDE's with built-in or available support for Lasso.
The following tools ship with built-in support for the Lasso language:
BBEdit is the leading professional HTML and text editor for the Macintosh. Specifically crafted in response to the needs of Web authors and software developers, this award-winning product provides a plethora of features for editing, searching, and manipulation of text. BBEdit transforms text with high performance.
Coda is a one-window web development app. Coda takes all of the tools you need to build the future of the web, including an integrated file browser, fully-featured text editor, CSS editor, preview, built-in terminal, and complete set of reference, and wraps it all in a single elegant interface.
SubEthaEdit is a powerful and lean text editor. And it's the only collaborative one you can actually use. By combining the ease of Bonjour with the world's best text collaboration engine, it makes working together not only possible but even fun.
ForgEdit is a programmers text editor for Mac OS X. It is a customizable and competent editor, that blends well with OS X and corresponds to the user-friendliness that every Mac user expects.
Araelium Edit is a general purpose software development application designed specifically for Mac OS X. The tools introduced with this release focus on source code editing and project organization. Exploring what the application has to offer is best done by reviewing the four main work spaces: the project window, the document editor window, the global resources window, and the application preferences.
Other tools, including older versions of those which now support Lasso natively, can be extended to include Lasso syntax coloring via custom language modules: