Ping-O-Matic - Service to update different search engines that your blog has updated.

Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.

TotalPing! - Promote your blog with TotalPing!

BoldVoice - Accent coaching app for non-native English speakers

Pingler - Pingler is a tool that allows you to ping your blog or website, so that followers can know if your site is online after any update, maintenance, etc.

Andy Chatbot - Learn and practice English with exercises, grammar and games