In november,I have renew an old app. Rarefeitos was written for Firefox OS in first time, as a sound effect board.
This new version was rewritten from scratch. It has now a pretty look. All sounds were replaced to others, under Creative Commons Zero.
In addition, Rarefeitos has now a timer with background music. It is now a good tool to use in Twitch activities, specially if you make bookstream or work sprint.
It can be used from Apps Cordeis. Unfortunately, for now the interface is only in Brazilian Portuguese.