By John Gruber
Square Reader SDK lets you use Square hardware to take payments in your app.
A text-to-HTML formatting syntax for web writers, implemented as a plug-in for Movable Type, Blosxom, and BBEdit. Markdown allows you to write using an easy-to-read, easy-to-write plain text format, then convert it to structurally valid XHTML (or HTML).
A plug-in for Movable Type, Blosxom, and BBEdit that provides smart quotes and other typographic goodies.
Vesper was a simple and elegant tool for collecting notes, ideas, things to do — anything you want to remember. Vesper lets you use tags to group related items into playlist-like collections, and now offers fast, reliable cloud-based syncing. Alas, it is now defunct.
A Mac OS X service that takes as input the text selection in the frontmost app. Every URL within the selected text is opened in a tab in one new window in Safari.
A plug-in for Movable Type that escapes strings for JSON. Useful when creating templates for JSON feeds.
A command-line tool for saving and loading text color schemes for BBEdit and TextWrangler. Obsoleted by the built-in color scheme preferences in BBEdit 10 or later.
A combination of Perl and AppleScript that allows you to syntax-check CSS files using the W3C’s CSS Validation Service.
Syntax-coloring language module for Apache configuration files, for BBEdit 8.0 or later.
Syntax-coloring language module for Movable Type configuration files (‘mt.cfg’), for BBEdit 8.0 or later.
Notes, comments, and observations regarding changes and additions to Mac OS X 10.4.
Command-line interface to BBEdit’s Find Differences command on Mac OS X. (Obsoleted by BBEdit 8.0's official ‘
bbdiff’ tool (which is not based on mine), but some people still prefer using this script.)