CKEditor & TinyMCE Quick Image Uploader is the best solution to upload images to server quick without file manager.
You can upload images to site yourself or configure site comments to let users ability to attach images to their posts.
If you are a webmaster/website studio you can build sites for your clients and be sure they can upload images onto the site pages without any problems.
No CKFinder required.
CKEditor & TinyMCE Quick Image Uploader has its own server side PHP & ASP.NET uploader which you can configure, and it is very flexible.