Java:Networking:Tools

• N-View
  
  (commercial) N-View is a network monitor for small and medium-sized networks. It features automatic scanning of subnets for host addresses, monitoring of ICMP responses from all hosts, signalling of timeouts and delays in the GUI and by mail, a portscanner, an SNMP client (MIB browser and trap receiver) and more.

Mac OS X:Software:Editors

• Nvu
  
  Nvu (pronounced N-view, for a "new view") is a complete Web Authoring System that combines web file management and easy-to-use WYSIWYG (What You See Is What You Get) web page editing. Nvu is designed to be extremely easy to use, making it ideal for non-technical computer users who want to create an attractive, professional-looking web site without needing to know HTML or web coding. Read more

Software:Editors:HTML

• Nvu
  
  Nvu (pronounced N-view, for a "new view") is a complete Web Authoring System that combines web file management and easy-to-use WYSIWYG (What You See Is What You Get) web page editing. Nvu is designed to be extremely easy to use, making it ideal for non-technical computer users who want to create an attractive, professional-looking web site without needing to know HTML or web coding. Read more