Hello Biostars!
I made an R-Shiny applet (and an R-package) that facilitates annotating unknown cell clusters in single-cell RNAseq experiments called CIPR. There are multiple human and mouse reference datasets in the program, and a few features to tailor the algorithm to different needs. Our paper describing the tool and benchmarking it against two other established methods (SingleR and scmap) was recently published in BMC Bioinformatics. We believe it will speed up iterative analyses where the user wants to try different clustering parameters and examine the identity of the predicted clusters.
The app is available at shinyapps server online. The source code is also shared on GitHub for the CIPR-Shiny or CIPR-Package implementations. Take a look and let me know if you have any suggestions!