HEATKEYS

Hundreds of user-friendly automatic calculations for all walks of life, from home and recreation to science and engineering, and all with built-in unit conversion.

Innovaci?n Tecnolog?Apropiada Comunitaria y Aut?a:Agua, Saneamiento, Solar, Letrinas, Electricidad, Construcci?Innovation on Autonomous Comunitarian Appropiate Technology:Water, Sanitation, Stoves, Latrines, Solar, Electricity, Construction

Free Irrigation Tutorials. How to design, install, and repair sprinkler & drip systems. Sprinklers, pumps, filters, winterization, & more.

Engineers Edge - Total Design, Engineering & Manufacturing Resouces

Welcome to Koiphen.com, the number one koi forum on the web!

eFunda, the ultimate online reference for the mechanical engineering community

Provides bandpass, sealed and vented subwoofer box design software and science, math and engineering programs and freeware

PEBCO

Scientific physics forums for professionals and students to discuss serious issues and topics regarding physics in theory, practice, study and reality. Students can also find help for homework and career perspectives

Tools and Basic Information for Design, Engineering and Construction of Technical Applications

Online civil engineering calculations for storm water, culverts, gravity sewer, water distribution, traffic engineering, surveying, floors, foundations, retaining walls, reinforced concrete, structural steel, wood design, engineering economics and un...