Is there a means for telling which module or template files generated a block? I am trying to find out what code generated a faulty looking devel block and want to know if there is a module that can tell where a block was generated or some other means.

Is there a module for that, something like the Module Summary, but with info on blocks?
If you haven't greatly overwritten the default block.tpl.php, you can tell by looking at the HTML attributes of the block DIV, which follow this naming convention:

&lt;div id="block-MODULENAME-DELTA" class="block block-MODULENAME"&gt;
  ...
&lt;/div&gt;