To give another example that's under the umbrella of the US Digital Service, https://www.vets.gov/playbook/ is an attempt to bring resources for veterans into a single website. Right now, veterans may have to navigate 1000+ websites, 956 different 1-800 numbers, and just deal with more hassle than they should.
I interviewed at the US Digital Service but ended up at the Defense Digital Service because that's where I thought I could help the most. There's some good info about the sort of projects that people at the USDS/DDS work on at https://www.usds.gov/work if anyone is interested. 18F at https://18f.gsa.gov/ is also doing great work, with the extra benefit that people can work for the 18F remotely. 18F has also been a proponent for more open source in the government: https://fcw.com/articles/2016/03/25/noble-open-code.aspx