ntdisp, short for NtD In System Programming, is a system for programming LPC and STM32 (and possibly other) embedded devices. It provides three different frontends, a GObject-based library (for developers), a commandline utility (for computer geeks), and a GTK+3 frontend (for less geeky users).
ISP-fW is a firewall script which provides port forwarding, packet filtering, stateful packet inspection, port redirection, masquerading, SNAT/ DNAT, TOS, and generation of htb rules for bandwidth management. It includes a Web interface for easy access. It's useful for ISPs which want to separate National traffic from International traffic.
Sequreisp is an ISP management software. It has a nice and powerful Web interface, and it can handle up to 3000 or more clients in a single server, thus it is oriented to small/medium ISPs and WISPs. It features load balancing, failover, prioritization, bandwidth control, P2P detection, Web cache, backup in a single file, VLAN support, and much more.
NeoBill is a Web-based customer management and billing solution designed for Web hosting providers, particularly hosting resellers. It can create invoices, manage domains, and provides other services. It has an API for CPanel and for Domain Registrare for automatic domain registration.