A video editor.
I couldn't get it working.
A straightforward equalizer app which works in the background.
Supported by unobtrusive ads.
A YouTube app.
A simple equalizer app that applies to all any app audio source and any output, be it speaker or bluetooth. Has no balance feature.
Phenomenal; simple. Mandatory/loved because bluetooth headphones are often manufacturer bass-boosted with no ability to disable it.
No permissions required or optional.
Downloads the comments on YouTube videos.
Used to be available at ytcomments.klostermann.ca but that IP got banned because of overuse.
See my youtube-comment-scraper.sh script for how I use it.
todo - there's a fork which can also get comments!
A commandline downloader for YouTube videos and playlists (and not comments). Also works for a surprising number of other websites.
It has no competition, so I guess I can say that it'll have to do, but it really is good.
youtube-comment-scraper for comments.
A straightforward PDF viewer with bookmarks and tabs.
A simple PDF viewer.
A cross-browser script that adds a button to download YouTube videos as MP4 and FLV files. This script downloads the videos directly from YouTube and it integrates with YouTube's interface.
It creates a button under the video, to the left of "Add to".
Abandoned, check out youtube-dl