Useful Software for Web Development

FileZilla

Open Source, fast, reliable, easy to use FTP-client for Windows 9x, ME, NT4, 2000 and XP with many features.
GIMP (GNU Image Manipulation Program)

Free but powerful image editor that can be used for tasks such as photo retouching, image composition and image authoring. Similar to Adobe Photoshop. Works with Windows and Mac OS X.
PDFCreator

Open Source program that can easily create PDFs from any Windows application.
Jaws PDF Creator

Affordable software for making high-quality PDF files. Many advanced features, works on Windows and Mac.
Transmit

Affordable, easy to use Mac OS X FTP client with a multitude of cool and powerful features.