One of those free services is Picasa.
When you create a site in Blogger and upload your first photographs in your first album in Google's Picasa service is automatically created. All images that you upload into your blog will automatically be stored in this album. Each account is provided with 1024 megs (1 gigabyte) of storage, however, images under 2048 by 2048 pixels will not count towards this total.
Why is this information useful?
- You can use Picasa for more than just photographs embedded in your articles, but can use them for design elements (such as background images or flourishes) throughout your site. You can upload images to the album, right-click on the image once it's uploaded to get the URL, and then use that URL in your site template.
- You can use Picasa's photo editor, Picnik to easily retouch, resize, crop, or other common editing needs.
- You can create albums and then export them as a dynamic slideshow to embed into your blog with easily provided HTML code.
There is a lot that you can do in Picasa and knowing where your images are being stored will come in very handy in future tips.
P.S. the image size limit was updated to match the new free size limitations