Open Source and Collaboration

Apache Software Foundation

Apache Syncope

Arduino

Black Duck Software

See also, https://www.blackducksoftware.com/

Boston Open Source Science Center

BYU Open Source Lab

Document Foundation

Farm Bot

Farm Hack

Free CAD

Free Software Directory

Free Software Foundation

Gimp

Github

Global Village Construction Set

Machines: Global Village Construction Set

Ingenuity Innovation Center

Kitware

Libre CAD

Libre Office

Linux

List of Open Source Hardware Projects

Media Wiki

MongoDB

Moodle

MTU Open Source Hardware Enterprise

My SQL

One Community Global Blueprint

Open Hub

Open Insulin Foundation

Open Office

Open Plans

Open Source Ecology

Open Source Education  Foundation

Open Source for America

Open Source Hardware Association

Open Source Initiative

Open Source Magazine

Open Source Pharma

Open Stack

Open Tech Collaborative

Opensource.com

OSU Open Source Lab

PHP

Public Lab

Pure Energy Systems

RBEM

Red Hat

Stanford Open Source Lab

Teaching Open Source

Ubuntu