There are many editors available which are suitable for authoring web pages. If you don't want to use a standard Unix editor such as vim, emacs or nedit, we recommend Komodo Edit (available for Linux, Windows and Mac), from http://www.activestate.com/komodo-edit

If you don't like doing things this way, there are some passable WYSIWYG editors available. For Windows, you can use Dreamweaver, or on Linux you could try Kompozer.

You can edit images on Linux systems using gimp, a free, Photoshop-like package.

On Physics Windows systems, several tools are available, including Photoshop, Xara, and Paint.NET.

Files and documents which can't easily be reformatted as HTML are probably best converted to PDF (Adobe's Portable Document Format). You can do this using either the full version of Adobe's Acrobat, or on Unix/Linux using ghostscript.

Existing paper documents can easily be transferred to PDF files on the web using one of the network scanners or copiers in the department (use the copier to email yourself the scanned document).

TeX documents can be converted to HTML (with some limitations) using the Unix program tth (TeX-to-HTML).