For students translating (or studying) Amos who may not have access to programs like BibleWorks, Accordance, or Logos, Tim Bulkeley has made available a nice (free) online resource (he also has a blog).
In his own words:
I teach Old Testament/Hebrew Bible at the University of Auckland and at Carey Baptist College, I prepared the Amos commentary and the associated Bible Dictionary material, as a prototype of a much more ambitious project to eventually produce a multi-author commentary/dictionary that covers the whole Bible.
The text is viewable in English or Hebrew. If you click on a Hebrew word, you can read some lexical info in one of the boxes. A nice feature is that you can also hear each verse in English or Hebrew.