BBEdit was created by Bones Software it is a text based authoring tool for the Mac, however it also contains a number of accessibility features.
A web developer can insert several DOCTYPES into the BBEdit editor. However the quality of the HTML is the responsibility of the web developer. Once the web developer has finished creating the page they can use BBEdit’s built-in syntax checker to validate the HTML. The syntax checker will produce a report showing any errors in the HTML that mean it is not standards compliant with the chosen DOCTYPE. The syntax checker can be accessed by selecting markup, check and then document syntax.
BBEdit allows a web developer to add accessibility features to nearly all HTML elements. However it does not state that adding these features to a site will improve the accessibility of the site to blind and visually impaired users.
A web developer can add the code for an image by dragging the image in from another document. BBEdit will then automatically enter the width and height measurement along with a blank alt text tag. BBEdit then provides a prompt for the web developer to complete the blank alt text tag. In some cases the web developer may need to edit the file path for the image.
BBEdit also allows a web developer to add alt text to form buttons, but it does not support the AREA element which is used to add alt text to image map hotspots.
A web developer is able to enter a title for a frame. However BBEedit does not support the NOFRAMES element. If a web developer wishes to use a no frames element then they will need to enter this manually into the HTML code.
BBEdit does not provide a method that a web developer can use to test their page for accessibility. However there are of number tools available on the Internet that allow a web developer to test there pages for accessibility, these are discussed on the automated testing tools page.
The BBEdit help files do not contain any information about web accessibility.
More information about BBEdit can be found on the Bones Software BBEdit page.