Here is the repository of information on world-wide collections from different laboratories of free-living nematodes of the Caenorhabditis genus and some other nematode general. Ask each relevant lab for their respective strains if they are not at CGC or CeNDR.
For sequence information for wild isolates of C. elegans, see CeNDR by Erik Andersen's lab.
For sequence information for other Caenorhabditis species and beyond, see Wormbase, WormBase Parasite, or the Caenorhabditis Genomes Project by Mark Blaxter's lab.
For various information on Caenorhabditis species, see and participate to the wiki.
The Félix lab strain collection is here, also containing mutant strains. The Braendle lab wild isolate collection is here. This database is managed by Marie-Anne Félix. Please send information when you isolate new strains or if you see changes to be made.