PicMonkey
PicMonkey.jpg
Thanks to the technology changes with HTML 5 and CSS 3, the web browser can do a lot more than just serve up web pages. Developers have been busy making Chrome and Firefox an essential tool for everyday needs, and in some cases replacing desktop applications.
If your doing any photo changes for the web, you should look into PicMonkey. The services is free for basic usage, or you can upgrade and get access to additional components. What makes PicMonkey great is that you can create different types of collages. This is great when you want to show lots of image in a single image.-
When you create a collage, you can select the number of images you want and how to display it in the collage. PicMonkey has the ability to edit the image within the collage, you can zoom in or re-touch the photo. Other web editors don't allow you to do.
Once you change and manipulate your image, you should use Yahoo's Smush.it to reduce the image size for emails and websites. Smush.it reduces the size without sacrificing on the quality of the image.
There's lots of Web 2.0 tools out there, you can check out Web 2.0 Tools over at Scoop.it! They have a blog of all sorts of creative tools that you can tap into to make your task much easier.