yappa-ng is an easy to use online PHP photo gallery. It has a comfortable and elaborate album-oriented photo album administration Web interface. Each picture can be viewed in many different sizes with resizing created automatically on the fly. It has complete user selectable language support, and supports password protected albums, hit counters for albums and images, album info, image captions, gallery overview, different themes, and a 'Top 10 images' ranking system for each photo album.
yaydl (yet another youtube downloader) is a commandline-oriented tool that allows you to download videos from video sharing Web sites (currently YouTube, Myvideo, Dailymotion, Clipfish, video.google, Metacafe, Sevenload, and Vimeo). The use of external programs like mplayer or ffmpeg enables it to re-encode the videos or to rip the audio off a video.
yet another yuv viewer (yay) displays 4:2:0, 4:2:2, 4:0:0 YUV, and Y-only pictures and sequences (planar Y:U:V format). It tries to find geometry information such as _widthxheight somewhere in the path and filename (e.g. mobile_352x288.yuv or path/to/yuv/mobile_640x480x400frames/file.yuv).
yplot is an interface to the PLPlot plotting library written as an extension of yorick. This combination allows one to quickly and easily create high-quality scientific plots from data, even in large structured files. yplot implements 2D line and scatter plots, contour plots, 3D surface, mesh and scatter and line plots. The user is given full control over every aspect of the plot, including symbol types, line types, label placement, fonts, etc. The results can therefore be made suitable for high-quality scientific presentation. A 60 page Postscript tutorial is included with examples and a reference section.