If you ask a room full of blockchain enthusiasts how the technology will affect the internet, the answers range from "a lot" to "more than you can even imagine."

Such responses were easy to elicit at the Ethereal conference in San Francisco on Friday. The gathering is a a day-long event for the founders, engineers, and enthusiastic users of a blockchain protocol called Ethereum.

Blockchain technology — also known as smart contract, or digital ledger technology — is the digital system behind bitcoin and a number of other unrelated applications. The technology isn't yet in widespread use, but many experts and enthusiasts believe it will soon become a pervasive new layer of the internet, underlying everything from payments to legal contracts to users' identities.

Many have pinned their hopes for the future impact of blockchain technologies on Ethereum. The protocol underlies a cryptocurrency called ether, which is bought and sold on many of the same exchanges where bitcoin is traded. But enthusiasts believe its real potential is as a foundation for new tools and services.

Ethereum has some obstacles to overcome before it becomes a world-changer. As of June, the protocol could only handle about 13 transactions per second. That's far shy of what Visa can handle, much less the giant online networks. Facebook, for example, handles about 175,000 requests each second.

Still, people are routing around Ethereum's limitations and are already developing unique and interesting projects using or related to the technology.

Here are five of those projects, as explained by the people behind them:

Keeping track of volunteer work and other socially beneficial activities

Anne Connelly, CEO at ixo FoundationBecky Peterson/Business Insider

Organization: ixo Foundation

What it's working on: CEO Anne Connelly and her team are developing a blockchain product that lets people log and then verify their volunteer jobs, charitable activities, and socially beneficial work, such as how many trees they planted, or how many hours they tutored a child. Once their activities have been verified in the system, the blockchain record of them can be used to apply for grants and subsidies.

How its system is being used: As a pilot project, ixo worked with UNICEF to build an app called Amply to help teachers in South Africa take attendance. The government there subsidizes preschool for lower-income kids, but the subsidies are based on attendance. Normally, teachers have to take roll on paper and then physically submit their roll sheets, a time-consuming process. The app allowed teachers to quickly and easily take attendance on their mobile phones instead.

The outlook on blockchain technology: "I think it's going to be massively pervasive in a year or two," Connelly said. "Typically they say with this level of innovation it takes a lot longer to happen then we expect, but when it does, it's much more impactful."

Digitizing the power grid to offer lower cost electricity

Matt Walters, lead architect at GridPlusBecky Peterson/Business Insider

Company: GridPlus

What it's building: Lead Architect Matt Walters and his team are developing a virtual energy grid that will sit on top of the national energy system. Once deployed, GridPlus will sell energy to consumers at a small premium to wholesale prices.

The energy will be distributed using tokens — essentially, digital coins — which can be saved or passed to other people if they're not used. Since tokens are easily divisible, Walters said users will be able to pay in smaller fractions than they can with dollars. For example, a consumer could use her tokens to just pay what it costs to illuminate a single lightbulb for 15 minutes, something that would amount to a small fraction of a cent.

How its system will be used: GridPlus will start off as a retail energy provider in Texas, whose deregulated energy market is easy for companies to enter. The company's goal is to eventually cover the entire country. It's also working with Tokyo on a similar project.

The outlook on blockchain technology: "I think all of this will happen in the next two years. It's not even far out," Walters said.