YouTube Mixer
YouTube Mixer is a keyboard-controllable application for mixing audio using two embeded YouTube video players. This is of course nothing new, I just wanted to make one that's more accessible.
Download source
ekezet.com
Web
YouTube Dubber
With YouTube Dubber you can mix the video and audio channels of two YouTube videos together with adjustable timing. Also provides a simple facility for saving your creations via generated links.
YouTube Favorites Search
A simple interface for searching the favorite videos of any YouTube user.
Open YouTube Favorites Search…
CloudPlaylist
This is a tool for creating playlists of tracks from Soundcloud. Includes a bookmarklet with which you can add new items while browsing. Saving and loading your playlists is also possible.
MIKORLESZMÁR?
This is a handy tool for unpatient people which provides them with information on how long they have to wait. Hungarian only.