This is the GUI Interface to a proprietary server that interfaces with speech recognition backends.
apt-get install libqt5gui5
This is a qt-creator project and can be imported as such. To build for Windows (on Linux) you need MXE.
To download and compile MXE and dependencies:
git clone https://github.com/mxe/mxe.git
cd mxe && make qtbase
make -j 4 qt qt5 MXE_TARGETS='x86_64-w64-mingw32.shared i686-w64-mingw32.shared x86_64-w64-mingw32.static i686-w64-mingw32.static'
make qtbase
Setup the actual compilation enviroment:
MXE_ROOT=/path/to/mxe/root/
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:$MXE_ROOT/usr/bin
$MXE_ROOT/usr/bin/i686-w64-mingw32.static-qmake-qt5
make
Also check the cross_compile.sh file in this project.
I do not own a Mac, so I haven't tried, but there is no reason why it wouldn't run on a Mac.
The stylesheet used is "Qt dark orange" by LoneWolf.