Transmit 5 is an excellent FTP (file transfer protocol), SFTP, S3 (Amazon.com file hosting) and iDisk/WebDAV client that allows you to upload, download, and delete files over the internet. With the most Mac-like interface available, Transmit makes FTP as simple, fun, and easy as it can possibly be.

Time Sink watches how you use your Mac, recording the time spent in each window and program -- whether that be foreground or background time. You can view and export reports, exclude apps and windows, and group related tasks together into one pool, which is then tracked as a single object. Can be run as a normal application, or a menu-bar-only program.

PDF Squeezer is an easy-to-use PDF compression tool. It reduces the size of large PDF documents by compressing images and removing irrelevant information. This will help you obtain important savings in bandwidth costs, digital storage costs and network transmission times.

GoodTask is a Powerful Task/Project Manager based on Apple's Reminders & Calendars. You can use it as simple checklist to focus or as complex project management tool to get big things done.