Originally SmartVPN.biz(website is not available anymore) was a small commercial VPN service for Russian segment of Internet. Several years later when the author got tired of endless technical support, the business was closed and all code was opensourced.
You can find some information about it at https://news.ycombinator.com/item?id=9791633.
In Russian:
TBD
- smartvpn-billing - Userspace, backoffice and API for servers
- smartvpn-node
- smartvpn-http-hooks