John's solo work
Unlike the rest of the members of Queen, John never did much solo work. When they had time off between albums/tours, instead of working on solo albums like the rest, he spent that time at home with his family. Really the only solo work, other than helping out others with their solo work (Freddie's Barcelona, Roger's Strange Frontier, and on two of Elton John's LPs, among others) was with The Immortals for a track called "No Turning Back" which was used in the film Biggles: Adventures in Time. Other than that, there's not really anything. He never released any albums or anything, as he had no intentions in doing solo work, and (as he claims) he can't sing.