MultiMAP is a method for dimensionality reduction and integration of single-cell multi-omics data. It recovers a single manifold on which all of the data resides and then projects the data into a single low-dimensional space so as to preserve the structure of the manifold.

MultiMAP can also be used for batch correction. 

CellphoneDB is a repository of manually curated ligand-receptor interactions, integrated with a computational framework to infer cell type specific interactions from single-cell transcriptomics data.