Accipio Leadership and Management Hub

Assessments (free)

DISC Profile - Tony Robbins
How Good Are Your Leadership Skills? - MindTools 
How Motivated Are You to Lead? - MindTools
Leadership Assessment Tool Inventory - Northwestern 
The Leadership Legacy Assessment Test: Identifying Your Instinctive Leadership Style - Rob Galford
What’s Your Leadership Style? - Harvard Business Review

Articles

Decoding leadership: What really matters - McKinsey & Company 
Developing leaders in a business - McKinsey & Company 
Gallup's Leadership Research - Gallup
Lead at Your Best - McKinsey & Company 
Leadership: 7 Ways to Get From Good to Great - Inc 
Little Book of Leadership - Phil Dourado 
The 21 Irrefutable Laws of Leadership: Follow Them and People Will Follow You - John Maxwell 
The 9 Traits That Define Great Leadership - Inc 
The Power of Mindful Leadership - Huffington Post 
The Top 10 Leadership Competencies - Psychology Today 
Top Ten Traits of Great Leaders - American Management Association 

Books

A Team of Leaders: Empowering Every Member to Take Ownership, Demonstrate Initiative, and Deliver Results - Paul Gustavson, Stewart Liff ($20.58) 
Carrots and Sticks Don't Work: Build a Culture of Employee Engagement with the Principles of RESPECT - Paul Marciano ($16.68)
Employee Engagement 2.0: How to Motivate Your Team for High Performance - Kevin Kruse ($9.95)
Everyone Communicates, Few Connect: What the Most Effective People Do Differently - John Maxwell ($16.43)
Good Leaders Ask Great Questions: Your Foundation for Successful Leadership - John Maxwell ($16.07)
HBR Guide to Leading Teams - Mary Shapiro ($15.45)
HBR's 10 Must Reads on Emotional Intelligence - Harvard Business Review ($14.29)
HBR's 10 Must Reads on Leadership - Harvard Business Review ($14.29)
How Successful People Lead: Taking Your Influence to the Next Level - John Maxwell ($8.63)
How to Win Friends & Influence People - Dale Carnegie ($15.26)
Lead Inside the Box: How Smart Leaders Guide Their Teams to Exceptional Results - Victor Prince, Mike Figliuolo ($8.59) 
Primal Leadership: Unleashing the Power of Emotional Intelligence - Daniel Goleman, Richard Boyatzis ($13.66)
Start with Why: How Great Leaders Inspire Everyone to Take Action - Simon Sinek ($16.04) 
Team Building: Discover How To Easily Build & Manage Winning Teams - Ace McCloud ($8.99)
The 21 Irrefutable Laws of Leadership: Follow Them and People Will Follow You - John Maxwell, Stephen Covey ($17.67)
The 5 Levels of Leadership: Proven Steps to Maximize Your Potential - John Maxwell ($15.16) 
The 7 Habits of Highly Effective People: Powerful Lessons in Personal Change - Stephen Covey ($16.85)
What Makes a Leader: Why Emotional Intelligence Matters - Daniel Goleman ($19.95) 

Online Courses

Advanced Management Training: Leadership, Negotiation + More  (9hrs) ($78) 
Eduson Leadership  (3hrs) ($0)
Embody The 6 Qualities of a Leader  (2hrs) ($99)
High Performance Collaboration: Leadership, Teamwork, and Negotiation  (October 19) ($426) 
Inspiring Leadership through Emotional Intelligence (8 week, 3/4hrs/week)
Leadership Fundamentals (hr 24m) 
Management for a Competitive Edge (3h 36m) ($0)
Management Tips  (5hr 26m) 
New Manager Training (3hr) ($70) 
Team Leadership: Facilitation and Communication Essentials (3hr 13m)  
Transformative Leadership: Learn to Build and Lead High Performing Teams  (2hr) 
Inclusive Leadership Training  (Jan 19) (18hrs) ($150)
Building Your Leadership Skills (Oct 12) ($84)

Learning Plans

Build Leadership Skills - Lynda.com  
Leadership Development and Training - Don Clark

Videos

Thought Leaders (Twitter)

Bill George
Chris Edmonds  
Daniel Goleman
Dan Pink
Dan Rockwell
Doug Conant  
Ed Batista
Fawn Germer
Frederique Murphy
Jim Collins
Jim Kouzes
John Baldoni
John Maxwell
Ken Blanchard
Lance Secretan
Lolly Daskal
Marshall Goldsmith
Simon Sinek
Stephen Covey
Susan Mazza
Tony Robbins
Wendy Appel

Additional Leadership Resources

ACCIPIO
American Management Association
Center for Creative Leadership
CrossKnowledge
Dale Carnegie
DDI
Franklin Covey
Harvard Business Review  
Kotter International
Leadership Toolbox
McKinsey & Company 
Mind Tools
The Coaches Training Institute
The Leadership Challenge
The Leadership Circle
The Leadership Resource
University of Oregon