AWS GovCloud - Isolated AWS Region designed to allow US government agencies and customers to move sensitive workloads into the cloud.
CivicPlus - CivicPlus offers government website design and development services.
Granicus - Granicus provides a cloud platform and product suites that help improve government transparency, efficiency, and citizen participation.
ClearGov - Transparency & Budgeting Software for Local Governments | ClearGov
GovDelivery - GovDelivery enables public sector organizations to connect with more people and to get those people to take action
Revize CMS - Revize is a web-based content management software designed for municipalities.