Since the system itself is open sourced, there are code libraries to enhance the work piece and modelling it.
“The stack”
Back-end: Linux, PHP, Apache/Nginx, MySQL or PostgreSQL
Front-end: AngularJS, Javascript, Html, CSS. Built with NodeJS and Browserify. Using Leaflet for mapping, and a collection of other frontend libraries”
I'm not sure if other systems have been modeled off this one; however, it seems as though the Disaster STS network uses a similar system of annotating works in order to share their concepts and engage in discussions with others.
There are many websites and papers that cite this website due to the extensive amounts of data that are collected from this site. The website provides a lot of information and data based off health afflictions as a result of 9/11. Since this registry is the largest of its kind, data from it is pulled for numerous studies on 9/11 and its health effects.
There are thousands of data collection apps that use similar technical system as Twine, one more popular app is Fulcrum which uses the same real time collection ideas and integration between existing data and new data. Fulcrum however is aimed towards medium businesses that need to coordinate between employees. There also exists several open source options that also allow for independent data collection.
None that I'm aware of at this time, nor did Google review any answers. However, this web platform is more than likely modeled after other cause platforms-- areas where documentaries can be viewed and discussed
While I cannot find a direct link between Cloud 9 and other software platforms, other online services and apps have similar features that offer counseling, but none that are readily available that link providers and patients directly.
From the search of app store on my phone, there is no app has similar function as Cloud9 does. Most of the apps just provide facts and general treatment to the user but not the interactions with parties like Cloud9 does.
From my research, Cloud9 appears to be unique and first of its kind. There are some online counseling services with apps but not as involved as Cloud9.
On the iTunes App Store, there is another app called Medical Management of Radiological Casualties that appears to be similar, but costs $7.99 to download, while REMM's app is free. This app appears to serve a similar function with providing support for healthcare providers, but also includes psychological support information, which REMM does not provide. This app also appears geared toward EMS responders, while the other is primarily made for physicians.