I took this photo while running errands, then tweeted and tagged +Trundlebedtales . Sarah is an expert in all that is Laura Ingalls Wilder and I knew she'd get a kick out of this random siting featuring Rose.
Here is that photo processed with the Waterlogue app.
For a free online alternative, try:
Tons of effects and filters.
And here is a Symbaloo mix I've done, called "Fun with Images".