KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Bizness Apps - Create your own app or become a reseller and build apps for others
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
QUCS - Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit.
BuildFire - BuildFire is the easiest way for small businesses to build a mobile app in a matter of minutes for iOS and Android.