7todos - A task board for indie hackers

ARPAY - Buy gift cards at ar-pay.com, which allow you to access your favorite internet services: online games, e-wallets and console games, online shopping cards and many more!

Butterfly - Butterfly is the web platform & chat-bots that offer real-time coaching to continuously develop managers based on their team's feedback.

G2A - Enjoy the vast offer of Steam, Origin, Uplay, Battle.net, GOG, PSN and XBOX CD-Keys at the most attractive prices on the market. Don’t overpay – buy cheap on G2A.COM!

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Kinguin - Marketplace to buy/sell game keys for a myriad of platforms including: Battle.