Cubie Messenger (http://cubie.com) is a mobile messaging app launched in Mar '12 on iPhone and Android, which got 5.5 million users within 10 months.
Cubie hit Top 1 (total) in 10 Asian and Middle East countries, and No.1 (social) in 16 countries. Cubie also hit No.13 in US and No.10 in Japan (social).
Cubie allows to send drawings while chatting, and offers tons of animated emoji, and can share photos, videos and voice.
Clipping is a handy way to collect important slides you want to go back to later.