GitForce is a visual front-end to git: https://sites.google.com/site/gitforcetool/home
Z80 Explorer is a Zilog Z80 netlist-level simulator: https://baltazarstudios.com/z80explorer
PlayZX is a Sinclair retro games converter/player: https://baltazarstudios.com/playzx
Flight Sim Remote Player is an X-Plane’s GA instrument panel: https://baltazarstudios.com/flight-sim-remote-panel
LinICE is a source-level kernel debugger: https://sites.google.com/site/linicetool
Flight Sim Remote Panel (or its alias name, “XPlaneRemote”) is an Android application that shows the basic general aviation instrument set on your Android phone or a tablet. It is not a flight simulator – a copy of X-Plane 11 should be running on your desktop or a laptop – this application connects to it from an Android device and displays the flight instruments, hence the “remote panel” in its name.
PlayZX is an Android application that lets you select from thousands of Sinclair ZX Spectrum games and play them through the headphone jack to load them onto your Speccy. You can also select your local (on the device) files, convert them to sound files, and then play them. This way you can load games for not only the ZX Spectrum micro but also a few other retro computers that have a compatible audio jack.
This blog post describes the various tools that I use for both work and hobby projects, on my development PC.