Vimerl is released under Vim license (see :help license).
This is the list of people who have contributed to this plugin:

Copyright (C) 2007-2011 Oscar Hellström
Copyright (C) 2008      Csaba Hoch
Copyright (C) 2010      Martin Carlson
Copyright (C) 2010      Phillip Toland
Copyright (C) 2010      Jonas Ådahl
Copyright (C) 2010-2011 Pawel Salata
Copyright (C) 2010-2012 Ricardo Catalinas Jiménez (current maintainer)
Copyright (C) 2011      Edwin Fine
Copyright (C) 2011      Eduardo Lopez
Copyright (C) 2011      Ryosuke Nakai
Copyright (C) 2011      Per Andersson
