the Simon Fraser University Library Research Instrument [1] (SLRI) is "a web to Z39.50 client interface" brought to you by the good folks at SFU [2]. it's an adaptation of the web to Z39.50 gateway developed by Harold Finkbeiner at Stanford, licensed under GPL and recently spied at sourceforge.net [3] as well.
Links:
[1] http://www.lib.sfu.ca/slri/
[2] http://www.lib.sfu.ca/
[3] http://www.sourceforge.net/project/?form_grp=343