JUAN FALGUERAS CANO  In a 2xG5 directly gives you an alert

"An exception class NilObjectException was not handled. The application must shut down."

:((  
(Version 1.5)

JUAN FALGUERAS CANO  It is a pity that this very interesting educational item insists in slugs(?), feet and other non international measurement units not offering at least a quick way for changing them all to the standard, that on the other hand are always used in the explanations as we all have learned in the schools. Also the output number format (engineering with things like 1.3e2) could be much better (130).  
(Version 2.03)

JUAN FALGUERAS CANO  I have been using Alpha (now AlphaX) many years ago. I've try BBedit and others. Alpha is different in many aspects. Alpha is like a programming environment in itself. It has embedded Tcl as programming language. You probably will find yourself loving that powerful language. MacOSX cames with it out of the box. Alpha Tcl has a lot of work made by many many programmers (real programmers) in it. It covers many languages (La-TeX, C/C++, Python, Perl, Ruby, Obj-C, SQL, XML, HTML with three longs specialized menus, etc, etc.)

It is shareware and have been there before BBedit were.

You mut try it!!  
(Version 8.0.1)

JUAN FALGUERAS CANO  Try AlphaX  
(Version 8.2.4)

ENDE  It interferes with the extra buttons of Macally iKey5 keyboard :((  
(Version 10.4)

ENDE  It works like a charm on my Mac (2xG5, Tiger). I missed this important feature .CHM -> PDF and vuala! here it is!!!

I only miss a way to enlarge the Courier font, specially in .chm dedicated to programming, where the Courier listings are so frequent. It would be great to have some preferences where to select the size of default (?) fonts...

Great update, faster than the previous.

Anyway, Chimp is far away from Chmox, CHM Viewer, and Xchm. It has find, it is more robust and faster launching...  
(Version 1.1)