So, when you feel like it, pay him a coffee (or two). Moreover, the developer worked on MidiEditor in his (rare) sparetime and offers it for free. Should MidiEditor be a software which is helpful for you and which you use often, please let the developer and other users know by providing feedback.
It is entirely written in C++ (Qt) and is available for the platforms Linux and Windows. MidiEditor was developed by Markus Schwenk. The recorded data can be easily quantified and edited afterwards using MidiEditor.
New files can be created and the user can enter his own composition by either recording Midi data from a connected Midi device (e.g., a digital piano or a keyboard) or by manually creating new notes and other Midi events. The editor is able to open existing Midi files and modify their content.
MidiEditor is a free software providing an interface to edit, record, and play Midi data.