If you are looking for a "free download," the base simulator DCS World includes two free aircraft and two maps:
By default, FC3 aircraft use keyboard shortcuts rather than clickable buttons. Community mods like "Clickable FC3" or "Flaming Cliffs Clickable Cockpit Continued" can be downloaded for free to make these cockpits interactive. DCS: Flaming Cliffs 3 Free Download
A highly detailed light attack jet with a fully clickable cockpit and carrier capability. If you are looking for a "free download,"
A high-quality helicopter mod for transport and utility missions. DCS: Flaming Cliffs 3 Free Download