Pat Northey of LawHawk in New Zealand sends this to Slaw:
The Index to Common Law Festschriften is an exciting new addition to legal research is the culmination of a three-year project funded by the Law Foundation and undertaken by a small team at the University of Auckland Library and Law School under the direction of Professor Mike Taggart. This is the first index of contributions to common law Festschriften and fills a serious bibliographic gap in the literature of the common law. This collection is complemented by the Legal Essays collection available from the Davis Law Library.
There are some 270 Festschriften indexed on the database as well as more than a thousand entries of English language contributions to predominantly foreign language, non-common law Festschriften.
Pat reminds us, too, about the Commonwealth Legal Information Institute (CommonLII), with links to resources from over 70 countries.