FreeImageHost.eu is one of the most simple and effective free image hosting services online.
At the home page you can find a bunch of form boxes where you can submit more than 30 images at a time, the only limitation is that you may not upload more than 3 mb of pictures at once. You can also select the thumbnail form you would like the pictures to be shown as and choose the content type between “safe for work” and “not safe for work”. In addition, you can also create your own image gallery by clicking the “create a gallery from uploaded images” box at the bottom. If you want to upload all your images in a zip file you can also do so by using the form box located below the image boxes and by doing the same process and options of regular pictures. 
