nexml
There are 4 repositories under nexml topic.
ropensci/RNeXML
Implementing semantically rich NeXML I/O in R
bioinfweb/TreeGraph2
A feature rich and easy to use phylogenetic tree editor
vibbits/phylio
Read, write, and manipulate phylogenetic trees
bioinfweb/JPhyloIO
A Java library for event-based reading and writing of different phylogenetic file formats through a common interface