If you own an app, feel free to share it and why I and others reading should use it. There are a lot of frustrated people that need an option.
-Start the app, which cues your camera
-Take a photo
-Apply pre-set filter
-Share
The Classic Print app is a bit more complex and linuxy:
-Take a photo with the stock camera app
-Open the Classic Print app
-Navigate the filesystem to open the photo you just took
-Apply the filters manually (there is only one pre-set filter, but you can tweak the filter settings to change color balance, noise, polaroid-style white frame, fading, etc.)
-Save your modified photo
-Open your web browser to navigate and share to various social media sites
While it's not the easiest to use, it is all free and open source.
i'm also considering starting a new tumblr site as a means to sharing my photos.