Futurpreneur provides financing and mentorship to young entrepreneurs. If you happen to be in the Futurpreneur network and your startup is struggling with cash, you can access financing through them. This option is however limited for non-network and already established businesses.
There are many other programs that small businesses can use to access the working capital. Most of the programs from the government provide support for operational cashflows. If you are looking for business expansion, you can always access credit from financial institutions.