Here is the Adobe Acrobat Reader which is fully free and good application for viewing PDFs. Now available in android also. You can quickly view PDFs and you may search, scroll, and zoom in and out from the app Just open pdf documents from any platforms like email and web. and sharing option is one of the feature of this Adobe Acrobat Reader. It is available in many languages like Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish and Turkish, English, Chinese Simplified and Chinese Traditional etc.
You can sign in to your free Adobe Document Cloud account and Connect your Dropbox account immediately. You can also make comments by using sticky notes and may drawing tools and there is reading mode, continuous roll etc.
you use your phone camera to take any pic and save it as pdf. that would be a great feature on this application. you are able to scan multiple document pages into a single PDF. Just annotate and review desired PDFs. You can share the PDFs with all of your friends. It requires Android 4.4 KitKat+ and above.
If you subscribe to Adobe PDF Pack using In-App Purchase you will get chance to create PDF files then also convert other files to PDF.You can also save the PDFs as editable in Microsoft Word or Excel. So this is a golden chance to gain the application. get it from below links.