It doesn’t quite match the mighty TextExpander feature for feature, but the essentials are there. Definitely worth checking out (it’s free) if you aren’t already wedded to one of its rivals.
movgrab is a downloader for all those pesky sites that insist you use a big fat browser that runs flash in order to see their content. It’s a command-line app written in straight C.
Latte is a Mac OS X application that uses such Web engines as CodeCogs and Google Chart to typeset formulas written in LaTeX. Formulas can be dragged to other applications (e.g. Keynote, Pages) and, in the case of PDF formulas, scaled to an arbitrary size. Both the LaTeX input and the rendered output can be saved onto your local disk, making it easy to build a library of formulas.
FileShuttle makes it easy to upload files to your server via FTP or SFTP. You can drop files on the Dock icon, have FileShuttle upload screenshots automatically, and upload the contents of your clipboard with a command key combo.
Jason is a JSON viewer & editor for Mac OS X. It can open local documents as well as download JSON data via HTTP and, in case of invalid data, an error message is presented and the line containing the error is highlighted.
mitmproxy is an SSL-capable man-in-the-middle HTTP proxy. It provides a console interface that allows traffic flows to be inspected and edited on the fly. mitmdump is the command-line version of mitmproxy, with the same functionality but without the frills. Think tcpdump for HTTP.
Isolator is a small menu bar application that helps you concentrate. When you’re working on a document, and don’t want to be distracted, turn on Isolator. It will cover up your desktop and all the icons on it, as well as the windows of all your other applications, so you can concentrate on the task in hand.
Mount Amazon S3, Google Cloud Storage or Eucalyptus as a local filesystem. (Support for Dropbox and Rackspace Cloud Files is planned, too.)
Déjà Vu offers an intuitive and reliable way to back up your data. It’s a preference pane that lives in your System Preferences, and it allows you to schedule unattended backups of important folders, or even your entire system.
Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF, but is also great for viewing any PDF file.
BreakTime is a simple utility that’s designed to help you remember to take breaks away from your computer. It never forgets a break, running in your dock and / or menu bar (or even in the background).
Sleipnir is a suite of browsers for OS X, iOS, Android and Windows Phone with a rather slick tab-centric, gesture-controlled user interface and built-in bookmark synchronisation between devices.