Batch Docs - Replace text in, add or remove content, and edit thousands of Word documents in doc and docx formats, PDFs, RTF documents, and other text documents.
Okular - Okular is a universal document viewer based developed by KDE.
Word Batch Replacer - Word Batch Replacer - software to convert MS Word documents into clean compact web HTML/XHTML with all or selected formatting preserved.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Advanced Find and Replace - Search files with smart queries as with Google, replace simple or multiline text in multiple files.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.