Adventures of Lotte and her friends
Lotte is a little dog. She has family, a bunch of friends, and actually the whole world. There are a few books, a theme park, and three full-length animated feature films. The stories are lovely, full of humor, kindness, and positive inspirations. It's made in Estonia and Latvia by few local animation studios, and actual stories are quite unique. Songs are great and performed by popular local bands. Even though animation quality, characters, and plots are top-notch and translated to several languages, the marketing is relatively poor, so it's somewhat unknown in the rest of the world.
The three feature animated films are:
- Lotte Goes South 
- Lotte from Gadgetville 
- Lotte and the Moonstone Secret 
All three are great, suitable for kids from the age of 2.5, and fun to watch for animation-loving adults. There is no one plate to point to. I guess their theme park site is the most encompassing one.
Update: Since the time I originally wrote about it, I found two more features: Tom & Fluffy  and Ladybirds' Christmas  and in 2019 came out a whole new one: Lotte and the Lost Dragons.