3ders, too;
It used to be Thingiverse, but it became so slow and unusable on both my old Netbook and my cellphone.
More Web 2.0 gimmicks, but for a long Time All Feature requests regarding batch uploads have been ignored.
The sad part stopping uploading there also made me stop to make a thing a day.
But as publishing my items took longer then the design and print process I lost interest.