Photo Sharing Sites
The photo sharing sites that allow for unlimited uploads include:
Both of these sites have a huge number of features and allow customization to make the site look the way you want it to look. Personally, I have used Smugmug for many years.
I can not image my digital life without DropBox. I store any file that I may need to use on multiple devices and I archive lots of personal documents so I can get to them easily. While I do not use DropBox for my photos, this may be a great place to store your photos as well. You can easily share the photos from DropBox.
I use an online back up of my photos for several reasons as I like the security of being able to recover all of my photos easily. My photo archive is over 5 tb now. I have been using CrashPlan for some time now, but I have not tested to see if I could recover all of my photos, but I feel confident that I could do that easily (albeit slowly). Carbonite is another excellent on line back up that many people I know use regularly.
Photo Organization Software
To organize, find and share my photos I use Adobe Photoshop Lightroom. It has a good database, is fairly easy to learn, and has a number of features to make a photographer’s life easier.
There are lots of other programs out there that can help you out, like Photos from Apple if you use a Mac. Google’s Picasa was free and easy to use, but they are no longer supporting its use.