Android: I hate dealing with PDFs. I understand why they're necessary, but loading them is a pain and editing them is even worse. So, Adobe's news that Acrobat Reader can edit PDFs stored in your Dropbox is a godsend. Acrobat Reader is already a pretty useful app if you need to do more than just read a PDF on your phone. Now, however, the app supports Dropbox integration. So, if you have a PDF in your Dropbox folder -- or, more importantly, if someone shares a PDF with you through Dropbox -- you can edit it quickly and save it right back where it was. This is much handier than having to email PDFs back and forth, or download, edit and re-upload different versions. This feature has existed in the iOS version for a few months, but now it's finally arriving on Android.
Adobe Acrobat Reader [Google Play Store]