You may begin with the following: 

• BCC Research - Reports on major economic, scientific, and technological developments worldwide. Topics covered include advanced materials, advanced transportation technologies, biotechnology, chemicals, energy and resources, engineering, the environment, food and beverage, fuel cell and battery technologies, healthcare, information technology, instrumentation and sensors manufacturing, membrane and separation technology, nanotechnology, pharmaceuticals, plastics, safety and security, and semiconductor manufacturing.
• Frost & Sullivan - Reports and market trends and opportunities encompassing various technology-, energy-, and manufacturing-related fields. Topics including but not limited to chemicals, materials & food, industrial automation & process control, energy & power systems, automotive & transportation, and environmental & building technologies.
• Gartner Online - The database includes research findings on a wide range of IT-related topics, including analyses, opinions, trends, leading practices, and case studies. 
• IEEE Spectrum - The flagship publication of the IEEE, explores the development, applications and implications of new technologies. 
• ScienceDirect - Fulltext articles from journals on the life, physical, medical, technical, social sciences, and business and management. Often useful for tech-driven projects and startup ideas related research.
• Technavio - Reports on a variety of global industries including technology, healthcare, retail, energy, aerospace, consumer goods and automotive.