Journal of Difference Equations and Applications Journal of Difference Equations and Applications: (Routledge) Table of contents from vol.8 (2002). Full text to subscribers. (Difference Equations) http://www.tandf.co.uk/journals/titles/10236198.html
The Math Forum The Math Forum: A compilation of sites relating to Difference Equations. (Difference Equations) http://mathforum.org/library/topics/difference_eq/
Symmetries and Integrability of Difference Equations Symmetries and Integrability of Difference Equations: EuroConference on Analytic Difference Equations, Special Functions and Quantum Models on the Lattice. Helsinki, Finland; 19 - 24 June 2004. (Difference Equations) http://www.esf.org/euresco/04/pc04185/
Difference Equations to Differential Equations Difference Equations to Differential Equations: By Dan Sloughter. Published in PS/PDF with applets under GPL. (Difference Equations) http://math.furman.edu/~dcs/book/