Some important resources on NPO matters:

Service Providers

CMDS 

Peter SA Hendricks & Associates

KP Fiduciary Solutions

CFO360 Audit Accounting Advisory Tax  

rvice Excellence

Government:

NPO Directorate

Tax Exemption Unit

International:

International Center for Not-for-Profit Law

United States International Grantmaking

ICNL NGO Law Monitor

International Center for Civil Society Law