Genealogical Software - Other Software
In addition to some of the more specialized software, I use text editors, word processors, spreadsheets, databases, photo editors, and a myriad of other programs. Here are a couple of areas I'd like to mention.
PDF Readers
Often documents on the Web are in PDF format, such as some of the documents I've made available on this site. To read them, you'll need a reader such as Adobe Acrobat Reader or Foxit Reader. Both contain browser plugins so you can read documents online or save them to your computer to read later. Personally, I recommend the Foxit Reader. It seems to have a smaller footprint and is less prone to hanging up.