- Allegro Development
 - Offers integrated software for the energy industry. - APX, Inc.
- Provides solutions and services for energy, renewable, carbon, and environmental markets.
- Aspen
- Engineering software for electric utilities.
- Associated Systems, Inc.
- Software company offering a utility billing and customer information system with Internet access e-business features, compatible service work order system, and financial management system.
- Azteca Systems
- Offers Pipeworks, a GIS-based work management package for water and wastewater utilities.
- BizEE Software Limited
- Software and information to help businesses and other organisations to improve their energy efficiency through energy management/energy monitoring.
- Brayden Automation
- Offer solutions to manage demand charges.
- Cannon Technologies, Inc
- Specialises in the development of software and systems for electric utility remote metering, substation automation, and load management.
- Continental Utility Solutions
- Provides billing and reporting software for water, power, sewer, and natural gas utilities.
- Core Utilities
- Offers billing software for small to midsize water and wastewater utilities.
- Daffron and Associates, Inc.
- Financial, material and CIS management solutions for cooperatives, municipals and IOUs of all sizes. located in Bowling Green, MO.
- Digital Oilfield
- Web-based technology for the energy industry, including OpenInvoice, an application that automates the invoice generation and approval process.
- Energy Softworx
- Providing software services for the power generation industry.
- Energy Watchdog
- Online interactive utility bill auditing, tracking, analysis, and reporting service with a built in energy advisor.
- EnergySoft
- Title 24 and energy analysis software and services for residential and nonresidential buildings.
- EnerLink
- Energy management software for electric utilities, industrial, and commercial customers.
- EPIS, Inc.
- Markets Aurora, an electric market model that forecasts forward price curves, portfolio and resource value and analyzes risk.
- ESCA Corporation
- Real-time computer software products, systems, and services for the electric utility industry.
- Geotelec
- Consulting, GIS and AM/FM mapping, configuration support, database software development, application programming, engineering analysis, and billing expertise.
- Hansen Information Technologies Inc
- Packaged client/server infrastructure management software used by local governments, municipalities, investor-owned utilities, and airports.
- Henwood Energy Services, Inc.
- Management consulting, transactions assistance, advanced software for price forecasting and energy trading.
 Infochem Computer Services Ltd
- Consulting and software for phase equilibrium and thermodynamic models with applications for process simulation and fluid flow.- InStep Software
- Develops applications for the energy industry including plant information, materials management, and analytical applications.
- Kalki Communication Technologies
- Provides engineering, consulting, and automation solutions for power generation, transmission, and distribution, and utility communication. Based in Bangalore, India.
- KW International
- Supplier of trading, risk management, and scheduling systems for the energy industry.
- Metretek Technologies
- Provider of energy technology measurement products, services, and data management systems to industrial and commercial customers.
- MicroGADS
- Software collecting and analyzing generating and reliability data for submission to NERC or for use within the generating company.
- Microsimulation Tech
- Offers nuclear power plant simulation and reactor simulator software for transient analysis and training of plant operation.
- Milsoft Integrated Solutions, Inc.
- Develops engineering applications that are currently being used by over 500 electric utilities and consultants in the U.S. and abroad.
- NetSpace Systems, Inc.
- Provides products, consulting, and integration services related to large-scale AM/FM/GIS systems for the utilities and telecommunications industries.
- New Horizon Technologies
- Provides data acquisition and verification software for energy information systems. Also commissions energy metering and sub-metering hardware.
- Open Access Technology International, Inc. (OATI)
- Offers solutions for the deregulated electric utility industry.
- OpenLink
- OpenLink develops solutions for trading, risk management, and operations processing professionals for the financial and energy markets.
- OSI Software
- PI System - millwide information system to collect, store, display, analyze and report process information data from DCS, PLC, LAB and other automation systems.
- Peace Software
- Develops and implements energy customer information systems for gas, electric, and water utilities.
- Penn Well MAPsearch
- Specialising in oil and gas pipeline maps, power generation research, and digital data in CAD or GIS for the petroleum, power, and energy industry.
- PowerPlan Consultants, Inc.
- Financial software for electric, gas, and telephone utilities.
- PowerWorld Corporation
- Software developed to demonstrate the fundamentals of power system operations.
- Professional Computer Systems
- Developing billing and accounting systems for the utility industry.
- Resources Engineering Systems
- Specialising in software for the petroleum industry, including hydraulic fracture and stimulation software.
- RiskWorks
- Manage risk associated with the energy industry.
- RVS Software
- Programmes and tools designed to aid the bookkeepers, operators, managers, and auditors of small municipalities and utilities.
- Silicon Energy
- Develops enterprisewide energy management software that integrates existing building control systems, meters and databases from any number of facilities onto a single database.
- SOAPP
- Project development and power generation consulting services and software.
- SolArc, Inc.
- Developer of Right Angle, a multi-commodity trading software for the liquid hydrocarbons industry. Features include risk management, logistics, and reconciliation.
- Stonewater Control Systems
- Provides Internet-based electric energy analysis, monitoring, management, control, and conservation systems and consulting services that help improve system quality and cut costs.
- SUBNET Solutions Inc.
- Offers protocol test sets, source code libraries, and Substation Suite. Also provides networking solutions and training.
- Systems & Software, Inc.
- Turnkey solution provider for municipal & investor owned utilities: water, refuse, gas, wastewater, and electric. Developers of the MUPS (Municipal & Utility Package Software) system.
- Triple Point Technology
- Real-time energy trading and risk management software for financial and physical commodities including oil, refined products, natural gas, and electric power.
- Utility Management Services
- Providers of utility accounting software and expertise to businesses, school districts, and local governments.
- Vitec AB
- Develops and distributes products for using energy more effectively, primarily computer programmes for producers, distributors and consumers of energy.
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