I literally applied to work at McDonnell Douglas when I heard about DC-X! It went against my choice to NOT work for a defense contractor, but it was a really cool project. They were amenable to hiring me but a program manager told me in confidence that the project had lost support because the Strategic Defense Initiative's cancellation meant there was no money to continue the project. The demo flights were the last deliverable in the contract and after that the project was dead. It made me sad.
Landspace, 10 km — https://www.youtube.com/watch?v=8dNFknayVDU
Deep Blue, several km, hard landing — https://www.youtube.com/watch?v=H-g26Zt15lo
iSpace, 0.3 km — https://www.youtube.com/watch?v=NKCH9ElmmZA
CASC, 12 km — https://www.youtube.com/watch?v=55iVjGuf_sE (their 75 km attempt in January failed, and doesn't have a public video)
Space Epoch, 2.5 km, hard landing — https://www.youtube.com/watch?v=eTQK1kDpbw4
Thank you for posting this. DC-X was ground-breaking. Masten also had Xombie in 2010. https://www.youtube.com/watch?v=01FcUEjwDkk
The list is longer than that! The earliest hop was probably by McDonnell Douglas in 1993 https://www.youtube.com/watch?v=e_QQDY7PYc8