The McDonnell XF-88B Voodoo was an experimental, supersonic, jet-turboprop hybrid aircraft designed for the US Air Force. Essentially, it was a plain vanilla XF-88 Voodoo fitted with a nose-mounted Allison T38 turboshaft engine.
Douglas X-3 Stiletto test flight - video
Bell X-1 drop launch from a Boeing B-29 Superfortress - video
Pivoting wing NASA airplane - GIF and video