eBlock is a website that provides community web services at the neighborhood level. According to eBlock foundd Vivek Hutheesing:

eBlock began with a commercial impulse. A few years ago, I connected all of the homes in my neighborhood using a free website. I wanted to make identifying and hiring services more convenient and affordable by exploring how my neighbors and I could collaborate online to achieve this.... I began to appreciate that neighbors have a lot of common interests & concerns because they share a location.

eBlock provides an email-based alert system to promote public safety, offers emergency-preparedness lists and links, aggregates free offers from neighborhood stores, and claims to maintain privacy as an integral part of its model.

It appears to be a for-profit business and I'm not clear where its revenue comes from - possibly from participating businesses in the neighborhood.