For a long time I was asked to make a clear and readable list of dependencies between plugins in LeechCraft. Those dependencies are quite obscure, as some plugins depend on others directly, some depend only on some functionality of others, and there could be even cyclic dependencies!
Anyway, a few days ago I made a graph for that, and here it is. I do not even post thumbnails here since it doesn't make sense for an image wider than 3000 pixels.
Thus, ovals indicate the usual LeechCraft plugins, rectangles represent some of the functionality provided by plugins, and external non-standard (not Qt and not Boost) dependencies are of rhomboid shape. Arrows from rectangles go to plugins that implement the given functionality, and they are always black. Orange arrows show plugin-subplugin relations. Red arrows show "strict" dependencies, and blue ones show "recommended" dependencies — that is, everything would work without the latter, but perhaps in a suboptimal way, or missing some functionality. Red/blue color codes are used for plugin-plugin dependencies, plugin-subplugin dependencies (think Azoth, for example, which cannot work without at least one styling engine, which is also Azoth subplugin) and external library dependencies. "Strict" dependencies carry some kind of personal thoughts: for example, you can use Azoth or Snails without a password manager, but it would be quite a pain — you will be asked with a password to every other step, so the corresponding arrows are red.
Also, this graph doesn't contain all the plugins in LeechCraft: ones without dependencies (including subplugins depending only on their parent plugin) aren't shown.
That graph will be updated from time to time, so one could expect it to be more or less up-to-date.
If anyone wonders, graph's sources are here.