I recently listed some relatively low cost, near(er) term nuclear fusion power projects,  most of which originated at government labs or from government funded research at universities but are now being pursued by private ventures:

• Updates on five fusion power projects – Dynomak, Helion Power, EMC2 Polywell, Lockheed-Martin Compact Fusion, and Sandia’s magnetized fusion.
• LPP focus fusion update – Focus fusion at Lawrenceville Plasma Physics

Brian Wang lists these and two that I left out – General Fusion (backed by Jeff Bezos and others) and Tri-Alpha Energy (back by Paul Allen and others) : Updated Prospects for Commercial Nuclear Fusion – NextBigFuture.com.

Here’s a discussion about the L-M Compact Fusion scheme : Video: Podcast: Could The Fusion Age Be Upon Us? – Aviation Week.