LTspice - LTspice® is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits.
Pho.to - Improve and play with your digital pictures at Pho.
Circuit Simulator - Animated electronic circuit simulator using ideal components to visualize voltage and current.
Image Plus - Premium Multimedia Apps for macOS, iOS and Windows
Solve Elec - Solve Elec is a free educational program to draw and analyze electrical circuits.
Preseters - Preseters is an app by ArtHouse Design Studio that lets you access the complete list of available presets for Lightroom so you can download them to your mobile phone without much of a stretch.