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
Copyright (C) 2012      James Fish
Copyright (C) 2012      Zhihui Jiao
