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!
Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.
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.
Busuu - Join the global language learning community, take language courses to practice reading, writing, listening and speaking and learn a new language. Learn English with busuu's .