Journal of Materials Science Price: FREE Browse, search and download articles from the Journal of Materials Science. 

Civil Engineering Magazine Price: FREE Access articles from Civil Engineering magazine. Requires a user account with the American Society of Civil Engineers. 

Engineering Libraries Price: FREE Reference tool for structural and civil engineers. 

Indian Steel Table Price: FREE Four types of steel sections are covered in this app: equal angles, beam, channel and pipe. 

Sheet Metal Price: FREE Contains tables that list the thickness of aluminum, carbon steel, and stainless steel sheet metal. It also calculates the corresponding weight and ASTM tolerances of each sheet. 

Fluid Mechanics Price: FREE Calculate capacity, velocity, flow depth and percent flow for a circular pipe using Manning's equation for preliminary hydraulics analysis where open channel flow is assumed. 

Vibration Meter Price: FREE This app uses the phone sensors to measure vibration or the earthquake, and it shows a reference as a seism detector. 

Civil Calculator Price: FREE Simple calculator with civil engineering units. 

Metal Weight Calculator Price: FREE Calculate weights of different types of metals of different shapes required for building. 

Concrete Calculator Price: FREE Calculate amount of concrete needed for pouring slabs, footings and columns. 
Price: FREE
Access the informative and entertaining library of engineering videos and articles of ENGINEERING.com.
Graphing Calculator + Math, Algebra & Calculus
Price: FREE
Graphing Calculator by Mathlab is a scientific graphing calculator integrated with algebra and is an indispensable mathematical tool for students from high school to those in college or graduate school, or just anyone who needs more than what a basic calculator offers.
Price: $3.89
Across thousands of domainswith more continually addedWolframAlpha uses its vast collection of algorithms and data to compute answers and generate reports for you.