GotDotNet has released EXSLT.NET 1.1, a .NET library that implements 65 EXSLT extensions to XSLT from these modules:
EXSLT.NET library provides 13 unique extension functions of its own. New functions in this release include:
str:encode-uri()
str:decode-uri()
random:random-sequence()
dyn2:evaluate()
date2:day-name()
date2:day-abbreviation(),
date2:month-name()
date2:month-abbreviation()
EXSLT.NET is published under the GOTDOTNET WORKSPACES COMMERCIAL DERIVATIVES LICENSE, which Oleg Tkachenko says is an open source license, though I don't see it listed as one by the Open Source Initiative. IANALL (I am not a license lawyer) but the patent clauses probably disqualify this license from being true open source.