1) Drag-n-drop command: blt_drag&drop
	Updated version of Michael McLennan's drag and drop command
	(it's still maintained by Michael). 

2) Hypertext widget: blt_htext
	Allows text and Tk widgets to combined in a single scroll-able 
	window.

3) Busy window: blt_busy
	For handling user-interaction when the application is "busy".
	Manages an invisible "busy" window which prevents further 
	user device (keyboard, mouse, button, etc.) interactions.
	Also provides a different cursor which supersedes application
	cursors.

4) Bitmap command: blt_bitmap
	Lets you read and write bitmaps from Tcl. Can define X bitmaps  
	and create bitmaps from text strings.  Other options query any 
        loaded X bitmap.

5) Background "exec" command: blt_bgexec
	Like "exec ... &", but collects the output of the detached 
	UNIX subprocesses and sets a Tcl variable upon their completion.
	Can be used with "tkwait variable" to handle application's 
	expose events, etc. while waiting for subprocesses to finish.  

6) Table geometry manager: blt_table
	Specify window placements as table row,column positions. Also
	has many options for placing constraints on window resizes.

7) Barchart widget: blt_barchart
	
8) XY graph widget: blt_graph

9) Window option command: blt_win
	Lets you raise, lower, map, or, unmap any window.  

10) Watch commands: blt_watch
	Lets you specify Tcl procedures to be run before and/or
	after every Tcl command.  May be used for logging,
	tracing, profiling, or debugging or Tcl code.

11) Simple command trace: blt_debug
	Simply prints out each Tcl command before it's executed.  

12) Cutbuffer and bell commands: blt_cutbuffer, blt_bell
	The commands are derived from the "bellcut" extensions and are 
	provided as a convenience.  Credit should go to the author(s) 
	(I can't remember who they are. Sorry) for this work.

