The Collaborative International Dictionary of English (CIDE) was derived from the 1913 Webster's Dictionary and has been supplemented with some of the definitions from WordNet. It is being proof-read and supplemented by volunteers from around the world.
This electronic dictionary is also made available as a potential starting point for development of a modern comprehensive encyclopedic dictionary, to be accessible freely on the Internet, and developed by the efforts of all individuals willing to help build a large and freely available knowledge base.
There are several derivative versions of this dictionary on the Internet, in some cases reformatted or provided with an interface:

Shakespeare’s Modern Collaborators - Shakespeare Now

Recent work in Shakespeare studies has brought to the forefront a variety of ways in which the collaborative nature of Shakespearean drama can be investigated: collaborative performance (Shakespeare and his fellow actors); collaborative writing (Shakespeare and his co-authors); collaborative textual production (Shakespeare and his transcribers and printers). 

Building Team Power: How to Unleash the Collaborative Genius of Teams for Increased Engagement, Productivity, and Results

Building Team Power is a hands-on, how-to book. It is a roll-up-your-sleeves-and-get-your-hands-dirty book. It is applications oriented all the way. Don't look for complex psychological, sociological or academic group theory models here. You won't find any. Building Team Power extends and expands the reach of my well-received Mining Group Gold book. This one digs into the crucial behaviors you need to understand and practice to be a collaborative leader. It takes you into the "how-tos" for building collaborative partnerships and facilitating teamwork within your own work group, across work groups 

Wiki Writing: Collaborative Learning in the College Classroom

The editors of Wiki Writing: Collaborative Learning in the College Classroom, Robert E. Cummings and Matt Barton, have assembled a collection of essays that challenges this common misconception, providing an engaging and helpful array of perspectives on the many pressing theoretical and practical issues that wikis raise. Written in an engaging and accessible manner that will appeal to specialists and novices alike, Wiki Writing draws on a wealth of practical classroom experiences with wikis to offer a series of richly detailed and concrete suggestions to help educators realize the potential of these new writing environments.

Collaborative Intervention in Early Childhood: Consulting with Parents and Teachers of 3- to 7-Year-Olds"This is an incredibly helpful book - informed by research in infant/early childhood mental health, insights from the neurosciences, and the latest findings on sensory-regulatory processing difficulties. With its use of plain language and empathic stance, it both demystifies the complex processes underlying young children's development and offers ways to understand and respond to a wide range of emotional and behavioral issues. Collaborative Intervention in Early Childhood is an outstanding resource that early childhood specialists will embrace."--Gerard Costa, Ph.D