Some of the conferences WebsEdge has covered recently:

UK Conferences
LGA (Local Government Association) Conferences throughout the year
ADASS (Association of Directors of Adult Social Care)
AoC (Association of Colleges)
NAHT (National Association of Head Teachers)
PCL (Primary Care Live)
SOCITM (Society of Information Technology Management)
SOLACE (Society of Local Authority Chief Executives)
TUC (Trade Union Congress)
 
US Conferences
Global Health Conferences with the Global Health Council
ACHA/NCAL (American Health Care Association / National Centre for Assisted Living)
AHA (American Historical Association)
APCO (Associated Police Communications Officers)
AWRA (American Water Resources Association)
ICMA (International City Manager Association)
NASPA (National Association of Student Personnel Administrators)