Top 20 NuGet join Packages

Extension for EntityFramework for joins to in-memory data
Fixi API client library for .NET Framework.
Index-time and Query-time joins for normalized content of the Lucene.Net full-text search engine library from The Apache Software Foundation.
Extension for EntityFramework for joins to in-memory data
URL Join (url-join) binding library for Bridge.NET projects.
GroupDocs.Merger Cloud allows you to merge documents and manipulate document structure across wide range of supported document types - PDF, DOCX/DOC, PPTX/PPT, XLSX/XLS, VSDX/VSD, ODT, ODS, ODP, HTML, EPUB and many others. Merge several documents into one, split single document to multiple documents...
A has one convention which sets fetch join
A reference convention which sets fetch join
Monads (Maybe, Either, State, Reader, Writer) and monad combinators (Sequence, Sequence_, ReplicateM, ReplicateM_, MapM, MapM_, FoldM, FoldM_, ZipWithM, ZipWithM_, ForM, FilterM, LiftM, LiftM2, LiftM3, LiftM4, LiftM5, Join, When, Unless, Forever, Void, Ap, Compose, Guard, MFilter, MSum) in C#
Superfast way to join a table with an object list
Superfast way to join a table with an object list
Go here for more information: http://www.codeproject.com/Articles/488643/LinQ-Extended-Joins
NuClear.Utils.Join
Very simple LeftOuterJoin extension methods for both IQueryable and IEnumerable types
Package Description