FB2Reader (Supports popular ebook formats: ePub, fb2, mobi, rtf, html, plain text, and a lot of other formats)
Adobe Reader (for reliably viewing, printing, and annotating PDF documents)
DjVu (for *.djvu files)
Notepad++ (source code editor)
Microsoft Office (Supports: doc, docx, rtf,...)
Экранная Камера + ключ