This page will list tools and other resources that are of great help to a photographer (whether be a amateur or professional). If you use tools that are of a great help to you, please add them in the comments and I will add them.
Tools:
Photo Mosaic:
1. AndreaMosaic (link). A free tool for generating Photo Mosaics.
Photo Editors and Management:
1. Google’s Picasa (link). A free tool for managing photos, sorting them, sharing, and making creations.
2. gimp (link). A free image editor for many languages and operating systems.
Photo Directories:
1. 
Photos Submission Pages:
1. JPGMAG
