The ETE Toolkit was originally
developed at the bioinformatics department of CIPF (Valencia, Spain), and greatly improved
at the comparative genomics group of CRG (Barcelona, Spain) and the Structural and Computational Biology unit of EMBL (Heidelberg, Germany).
At present, ETE is maintained by the Comparative Genomics and Metagenomics group at CBGP (Madrid, Spain).
Citation:
ETE 3: Reconstruction, analysis and visualization of phylogenomic data.
Jaime Huerta-Cepas, Francois Serra and Peer Bork.
Mol Biol Evol 2016; doi: 10.1093/molbev/msw046
Older references:
Jaime Huerta-Cepas, Joaquín Dopazo and Toni Gabaldón. ETE: a python Environment for Tree Exploration. BMC Bioinformatics 2010, 11:24.
doi:10.1186/1471-2105-11-24