Free analogue of MS Office. It is open source. Consists of: Writer - Analogue to MS Word, Calc - Analogue to MS Excel, Impress - Analogue to MS PowerPoint, etc. Can work with Microsoft Office's binary formats - .doc, .xls and .ppt. Can export content to .pdf. It has a multilingual interface.

Adobe's software for viewing and printing of Portable Document Format (PDF) documents.

A good alternative of Adobe Reader for viewing of PDF documents. Opens them very fast, without any delay. Allows you to select and copy text from the documents.

Application for splitting and merging of PDF documents. A very useful office tool.

A very nice program for viewing and editing of PDF documents. Analogue to Adobe Reader. Can convert from and to PDF format.