Memecry!

Dubsmash is a mobile app to create short selfie videos dubbed with famous sounds.

VemeMaker is an online video meme (veme) maker. The website enables people to upload or link to gifs and videos for overdubbing multiple audio tracks online. Audio can be captured direct from device microphones, uploaded or selected from over 5000 samples. Each audio track provides the ability to pause or mute the original video whilst the audio plays.