Haplea (Blockhead) - Romania
A Kockásfülű Nyúl (The Plaid-Eared Rabbit) - Hungary
Janoschs Traumstunde (Janosch's Dream Hour) - Germany
Biene Maja (Maya the Bee)- Germany
Interestingly, Biene Maja was pretty popular and has Russian, Czech, and Polish dubbing (and Spanish!). It still plays on TV in Germany.
Bolek i Lolek (Bolek and Lolek) - Poland
(I recommend opening this in YouTube and seeing the other episodes!)
Oranžová Schránka (The Orange Mailbox) - Czech Republic/Slovakia
Doroteja in noj (Dorothy and Ostrich) - Slovenia
Měsíční Pohádka (Monthly Fairytale) - Zdeněk Miler
That's a load for today, but there should be future posts of more CEE animation!