Streams: This is a lightweight F#/C# library for efficient functional-style pipelines on streams of data (http://nessos.github.io/Streams/)

LinqOptimizer: This is an automatic query optimizer-compiler for Sequential and Parallel LINQ (http://nessos.github.io/LinqOptimizer/)

ExtCore: This is a core library extensions for F# (https://github.com/jack-pappas/ExtCore)

FSharpEnt: This is a collection of helpers for enterprise development with F# (https://github.com/colinbull/FSharpEnt)

FSharpx.Collections: This is a set of functional programming collections for F# (http://fsprojects.github.io/FSharpx.Collections/)

FSharpx: These are the extensions and tools for F# Programming (https://github.com/fsprojects/fsharpx)

F# Snippets: This is a community-contributed catalog of F# Snippets (http://fssnip.net/)