... We present a variety of Java-based visualization tools for collaborative astronomical research which integrate a number of diverse technologies currently under development at NCSA. The NCSA Horizon Image Data Browser is a Java package for building Java applets that interact with 2D visualizations of multi-dimensional image data. ... The VRML Server is used to create 3D visualizations of FITS image cubes from the NCSA Astronomy Digital Image Library (ADIL) in VRML format. ...