VIP (Vicariance Inference Program) is a free and open source program for historical biogeography analysis. VIP uses a Spatial Vicariance Analysis , based on the ideas of Peter Hovenkamp ,. Unlike other biogeography methods and programs, VIP uses direct geographic information data instead of predefined areas. Also, VIP is developed under a graphic user interface paradigm.
Further development of the ideas in VIP is implemented in GEM , which supersedes VIP; the ms. describing details is in preparation.
VIP binaries for Windows and Linux are available, as well as C source code. It is released under GPL Creative Commons license.
14 Sep 2011. A new version of VIP was uploaded
3 May 2011. A new version of VIP was uploaded
26 April 2011. Spatial Analysis of Vicariance paper, online in Cladistics
 Arias, J.S., Szumik, C.A., Goloboff, P.A. In press. Spatial analysis of vicariance: A method for using direct geographical information in historical biogeography. Cladistics. DOI: 10.1111/j.1096-0031.2011.00353.x.
 Hovenkamp, P. 1997. Vicariance events, not areas, should be used in biogeographical analysis. Cladistics 13: 67. DOI: 10.1111/j.1096-0031.1997.tb00241.x.
 Hovenkamp, P. 2001. A direct method for the analysis of vicariance patterns. Cladistics 17: 260. DOI: 10.1006/clad.2001.0176.