There are a variety of method of diagramming available to the student of the Bible, but very few tools to actually assist in creating such diagrams. Well BibleArc does just thought, providing scholars and preachers alike with an easy way to begin constructing their own diagrams. You can view my hastily created diagram to the left to get a taste.
The website includes instructions, a brief description of what all the symbols mean, and a plethora of videos and tutorials. You can diagram in a variety of English translations, or in Greek (complete with parsings). Improvements to the user interface (which is still a little cumbersome), as well as a repository of user-created diagrams, are apparently on the way. You can save diagrams to their site (with a user name and password), or export them as PDF documents.
Read more here
If you’re interest in the theory behind thought-flow diagrams, or with other types of diagrams (each with their own advantages and disadvantages), Cotterell’s Linguistics and Biblical Interpretation is an excellent starter resource.
