Spätzcells is a MATLAB program created to analyze fluorescence images obtained from single-molecule fluorescent in situ hybridization (smFISH) experiments in E. coli. For further information about the program and the smFISH protocol, please see:

Skinner, S. O., Sepulveda, L. A., Xu, H. & Golding, I. Measuring mRNA copy number in individual Escherichia coli cells using single-molecule fluorescent in situ hybridization. Nature protocols 8, 1100-1113, (2013). [PubMed]