Dustbiin

PDF viewer and editor for Ubuntu operating system. In now days lot's of PDF reader/viewer available for Ubuntu and they are also Open source, But if you want a software which is also useful for the advance thing like- Display PDFs with high fidelity Annotate & Markup PDFs Fill & Save Forms Render Digital Signatures & Layers Advanced User Interface Advanced Print & Search Options Document Storage Integrations DocuSign© Integration If you want a PDF reader which has all these feature then you can use QOPPA SOFTWARE PDF studio. PDF Studio Viewer ™ is a cross-platform PDF reader that is reliable and easy to use. PDF Studio Viewer can annotate PDF documents and fill interactive forms. For more editing features, Qoppa Software publishes PDF Studio Standard and Pro editions. Download Link- click hear Look like-

Captcha is use for human validation and you can make an costume captcha image in java- Example: import java.awt.Color; import java.awt.Font; import java.awt.GradientPaint; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.IOException; import java.io.OutputStream; import java.util.Random; import javax.imageio.ImageIO; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; public class Captcha     extends HttpServlet {     private static final long   serialVersionUID  = -4687606895768367L;     private int                 height            = 0;     private int                 width             = 0;     public static final String  CAPTCHA_KEY       = "captcha_key_name";     private String              severIP           = null;     public void init( ServletConfig