I have started many ideas, but lacked that extra confidence to invest more in the development of any invention. I also tend to use Lean Startup principles and am quite hard on myself when it comes to 'avoiding falling in love with my ideas' too soon, and ensure that ideas are validated with people before over-investing
Examples of inventions and innovations:
http://latitude52.byethost13.com/: Polish Luxury Breaks Company
A new type of paint tray that speeds up home decorating. Had my ideas designed and developed in Ukraine, 3d prototype printed in Poland, took it to various painting establishments in the UK.
Niche Job Boards:
FreelanceOnlyJobs.com - competitor to Upwork, blog posts and workflow assistance
Automationengineers - niche board, not many around
GlobalDatajobs.com - ""
SeniorMeetups.co.uk: A site promoting older people to get inspired and join communities and meet up