PDF-XChange Viewer 2.5.321.0PDF-XChange Audience is definitely an alternate viewer for PDF files that allows one to annotate and view PDF files. You can include sticky notes, text, and additional annotations and conserve them for the docu...
FireShot 0.98.92Capture and annotate web pages
Photopus Pro 1.4Easy to use software for photo conversion, watermarking, size adjustment, file rename, transform, touch-up, apply effects, and lots more!
PDF ShapingUp Advanced 4.0.1Full-blown or Free PDF Editor that Create, Manage, Modify, Secure & Convert PDF
Skitch 2.3.2.176Capture and annotate screenshots
Monosnap 3.0.6Allows you to quickly take, annotate and share screen snaps
FotoTagger 2.14Lets you publish annotated pictures to blogs, as well as share annotated images through Web and email.
PDF Studio PDF Software for Windows 9.1.0PDF editor to scan, annotate, fill forms, set security.