Comprehensive database of cell types
A currently active cell database is SHOGoiN, which says it is a significant extension of the world-first human cell database, CELLPEDIA.  It focuses on human cells but also has information on mouse, sea urchin, and C. elegans. 

The site says:


  The database consists of several modules that store cell lineage maps, transcriptome, methylome, cell conversions, cell type markers, and cell images with morphology data curated from public as well as contracted resources, based on sophisticated cell taxonomy.