1. JasperReports Library
JasperReports Library, the world's most popular open source business intelligence and reporting engine and JasperReports Server, the most popular open source interactive report server built-on JasperReports Library
2. PhotoFilmStrip
PhotoFilmStrip creates movies out of your pictures in just 3 steps. First select your photos, customize the motion path and render the video. There are several output possibilities for VCD, SVCD, DVD up to FULL-HD. Creates animated slideshows.
3. LibVNCServer
LibVNCServer/LibVNCClient are cross-platform C libraries that allow you to easily implement VNC server or client functionality in your program.
4. ZedGraph
ZedGraph is a class library, user control, and web control for .net, written in C#, for drawing 2D Line, Bar, and Pie Charts. It features full, detailed customization capabilities, but most options have defaults for ease of use.
5. GeSHi - Generic Syntax Highlighter
GeSHi - Generic Syntax Highlighter for PHP. Used to highlight almost any code for the web. Nearly 150 supported languages: PHP, HTML, C and more. Styles can be changed on the fly and CSS classes can be used to reduce the amount of XHTML compliant output.