Kate Russell's weekly review of new and interesting sites and apps.
A free smartphone app
echoecho
offers a more private way to find contacts that are close by.
Dagadop
allows you to search while watching YouTube videos and build playlists.
The Evolution of the Web
presents an animated info graphic that delves deep into the evolution of technologies that made the internet.
Trapit
is an intelligent discovery engine that builds traps around certain keywords, constantly adding to the collection and learning from what you like or dislike.
And finally,
Gimme Bar
is a web clipping and social bookmarking backup service with Dropbox integration to save treasures you find.
Follow the Click team on Twitter at @bbcclick
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