Fanatical - Buy awesome games. Pay a fraction of the retail price!
The Indie Gala - Buy a bundle of games, you decide the price, and support charity in the process.
Humble Bundle - Buy a bundle of games, you decide the price, and support charity in the process.
itch.io - An online game marketplace and community.
Groupees - Indie games bundles at low price to support charity.
Rubyapks - Rubyapks is a free web-based app store that is specially designed for Indie games lovers.