The Albert Einstein Institute has many free publication regarding nonviolent action in an online library (though some are just excerpts). Materials are in many languages.

The USIP Global Campus-American Friends Service Committee (AFSC) curated collection of experience: 100 years of Quiet Diplomacy, Nonviolent Resistance, and Peacebuilding. With videos, photographs, reading materials, and activities, the collection provides insights, lessons, and motivation from the AFSC movement.

Asia and the Pacific Policy Studies (APPS) is the flagship journal of Crawford School of Public Policy at The Australian National University. It is a peer-reviewed open access journal that targets research in policy studies in Australia, Asia and the Pacific, across a discipline focus that includes economics, political science, governance, development and the environment. The goal of the journal is to break down barriers across disciplines, and generate policy impact. Articles on the Pacific island region are especially encouraged.

The Asian Health Institute (AHI) publishes English Newsletter for sharing and learning among AHI friends.

The contents are; 1) Focus articles, 2) Flash articles, 3) Here and there, 4) News from Friends and 5) Announcement etc.

Some of the issues specifically deal with peacebuilding and conflict transformation.

The Canadian School of Peacebuilding (CSOP) offers a number of resources on their website. In addition to these publications, they also offer video and audio resources that you can watch and/or listen to online. You may also download for free a copy of the book Voices of Harmony and Dissent: How Peacebuilders are Transforming Their Worlds.

One of the best places for peacebuilding materials is the Center for Justice and Peacebuilding at Eastern Mennonite University. Check out their various publications, including The Little Books of Justice and Peacebuilding series. Many of the Faculty and Staff publications are free to download. 

Conciliation Resources has many resources in several different languages.

Encyclopedia of Violence, Peace and Conflict, Third Edition, Four Volume Set provides timely and useful information about antagonism and reconciliation in all contexts of public and personal life, from the interpersonal to the global. Building on the highly-regarded 1st and 2nd editions (1999, 2008), and publishing at a time of increasing conflict and violent behavior the world over, this book is an essential reference for students and scholars working in the social scientific study of peace and conflict, criminology, public policy and international relations, as well as for those seeking to explore alternatives to violence and share visions and strategies for social justice and change. Covering topics as diverse as Sexual Assault, Terrorism, Arms Control, Nonviolent Movements, Child Abuse, Folklore, and Political Assassinations, the Encyclopedia comprehensively addresses an extensive information area in over 250 transdisciplinary, cross-referenced and authoritatively authored articles (https://www.elsevier.com/books/encyclopedia-of-violence-peace-and-conflict/kurtz/978-0-12-820195-4).

PLEASE NOTE: This is not an online resource, but one that must be purchased. It is primarily geared to institutions and not individuals.

forumZFD Civil Peace Service has a wealth of publications (over 700 as of this posting). They include publications from forumZFD itself and from partner organzations regarding the work they do with their target groups.

Please note that the search page is in German, but you can serach by country, keywords, medium, language their partners or just enter a term in the box provided.

The Friedrich-Ebert-Stiftung (FES) is the oldest political foundation in Germany with a rich tradition dating back to its foundation in 1925. Today, it remains loyal to the legacy of its namesake and campaigns for the core ideas and values of social democracy: freedom, justice and solidarity. It has a close connection to social democracy and free trade unions. 

FES promotes the advancement of social democracy, in particular by:

• Political educational work to strengthen civil society
• Think Tanks
• International cooperation with our international network of offices in more than 100 countries
• Support for talented young people
• Maintaining the collective memory of social democracy with archives, libraries and more.

There are a number of publications of particular interest to those in the Philippines that can be found on their Philippine site. The have other publications on their German site in English, including Think Pieces.

The Think Pieces serve a dual purpose: On the one hand they provide points of reference for the deliberations of the reflection group and feed into the final report of the group in 2016. On the other hand they are made available publicly to provide interested scholars, politicians and practitioners with an insight into the different positions and debates of the group and provide food for thought for related discussions and initiatives worldwide. In this sense, they reflect how the group and selected additional experts "think" about the topic and hopefully stimulate further engagement with it.

The Global Campaign for Peace Education has many resources. Most of the materials are geared toward working with children.

Look under Explore/Resources as well as Explore/Publications.

The Global Campaign for Peace Education seeks to foster a culture of peace in communities around the world. It has two goals:

1. First, to build public awareness and political support for the introduction of peace education into all spheres of education, including non-formal education, in all schools throughout the world.
2. Second, to promote the education of all teachers to teach for peace.

Making Conflict Work is both a book and an app for IOS and Android. As stated on their website, "This book gives you the strategies you need for making conflict actually benefit your organization and your career." The app gives a quick assessment of a conflict situation—personal and professional—and how to approach it.

PartnersGlobal works through a global network to create partnerships with local change leaders to transform conflict, strengthen democratic institutions, and achieve sustainable development.

Their digital library includes case studies, success stories, research and other updates that illustrate a legacy of positive impact, including publications on Narratives for Peace.

The following materials are available from the Peace Exchange Resource Library:

• Sector-specific conflict sensitivity and peacebuilding frameworks and tools
• Webinar recordings from past Peace Exchange campaigns
• Training packages for facilitators and trainers
• Cutting-edge research and reports

Peace Exchange is "a global community of practitioners, donors, and academics who aim to improve conflict sensitive development programming by collecting and building knowledge on a diverse set of materials, experiences, and reflections." 

Peace Exchange is supported by USAID’s Office of Conflict Management and Mitigation and DME for Peace.

• Peace Education

Publishing focused on advancing the holistic fields of peace knowledge: peace research, peace studies, peace education & peace action. Peace Knowledge Press is an imprint of the International Institute on Peace Education in partnership with the Global Campaign for Peace Education. All net proceeds benefit these two global peace education initiatives.

Peace Work Africa has downloadable resource materials from the Civil Peace Service Africa program available in English and in French.

A resource page for people working in and on conflict

The Home is:

• A page for people working in and on conflict.
• A page that introduces key peacebuilding concepts.
• A page that stimulates debate and encourages exchange.
• A page that offers hands-on and tested advice.
• A page that offers free easy-to-use resources.

They also offer courses for a fee.

Developed by the Global Partnership for the Prevention of Armed Conflict (GPPAC), here you will find a flowchart that helps peacebuilding actors turn the SDGs into concrete actions at the local and national level by guiding you through a series of key steps. "The flowchart points you towards how to develop an advocacy plan on SDGs, where to find the governmental SDG focal point in your country, how to influence key actors on SDG16+ implementation, or how to write an 'SDG 16 + shadow report.'"

SIPRI has published hundreds of books, reports, fact sheets, background papers and policy briefs since its first book appeared in 1969. Oxford University Press publishes and distributes some SIPRI publication series. Other are available to download or buy directly from SIPRI.

SIPRI publications aim to provide policymakers, researchers, the media and the interested public with reliable information, analysis and recommendations. They are peer-reviewed, use only open sources and are transparent about the sources used.