PicMonkey
Canva
Marq
Piktochart
Adobe Photoshop
Fotor
Pixlr
GIMP
Circuit Tree
Logisim
CircuitLab
QUCS
KiCad
BOOLR
gEDA Project
PyLab_Works
Circuit Tree is an automation engine that autonomously designs a circuit board design with given user inputs. Using Components define as proprietary models in its database it creates schematic, component placement and routing on the fly. This means that the automation engine auto selects various types of components for a circuit and knows where to place and route these components on board.
Circuit Tree design engine has been designed by engineers who have experience of more than 20 years designing all types of first time right designs.
PicMonkey
Circuit TreeCanva - Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.
Logisim - Logisim is an educational tool for designing and simulating digital logic circuits.
Marq - Marq (formerly Lucidpress) is a web-based design and layout application that enables anyone to create beautiful creatives
CircuitLab - Sketch, simulate, and share your circuits, entirely in your browser -- no install required.
Piktochart - Piktochart for Business Storytelling
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.