Here you will find one: http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE59739
It is from this publication: Usoskin, D. et al. Unbiased classification of sensory neuron types by large-scale single-cell RNA sequencing. Nat Neurosci 18, 145–153 (2015).
There's a few datasets from the 10X Genomics platform here:
The Broad's Single Cell Portal currently houses 70 single cell data sets which can be perused. They also offer neat functions like showing you the expression of your favorite gene in all those publicly available data sets that they host etc.
If there are studies you would like them to include, get in touch with their Support team. Their major requirement for inclusion is to have access to the raw data.