Here are a few tools I've found handy while blogging. All of them are free with no regisration required!
FastStone Image Viewer - Fantastic free image viewer, converter, and editor. I use this all the time for viewing, cropping and editing photos and converting between formats. There are a lot of nifty tools in here too, including the Image Strip Builder I used to create the strip on the top of my blog.
Online OCR - Converts scanned images of text into a searchable Word, Excel, PDF, text or Html file.
Web2PDF - Converts a web page to a PDF file. This is great for saving something you want to go back and read later. They also offer some services I haven't tried like receiving the PDF file via email and adding a button to allow saving your blog posts to PDF format.
Web Resizer - Quick and easy way to resize photos for your blog. You can do some basic photo editing with it too.
Microsoft Clip Art - All kinds of free clip art, photos, and illustrations, including the one on the top of this post!
What are your favorite freebies?