LogicLike - Improve logical thinking through engaging brain games
Newton Virtual - Learn and enjoy
Dualnback.works - Dual N-back is a specific brain training exercise, that's been shown by research - it might improve fluid intelligence.
Eduonix - An e-Library to Learn, Grow and Succeed.
JobFlare - Brain games for job seekers
Crehana - Crehana is an on-demand learning platform.