SSuite Office Excalibur is a free Office suite with a vast number of programs.
There's a word processor and spreadsheet, just as you'd expect. And a presentation creator, and an email client. But you also get a formula editor, image viewer, graphics editor, media player, a collection of other utilities, even some small games.
The main applications can read and create older Microsoft Office documents like DOC, XLS, but not DOCX, XLSX, PPTX etc, so while Office users will be able to open your documents, you probably won't be able to edit theirs.
There are issues with many of the other applications, too. The image editor can open WMF and EMF files, for instance - but not PNG? And the "WAVE Player" claims it can open "all" your audio files, but this turns out to be only if they are MP3, WAV or WMA.
SSuite Office Excalibur has lots of features and functionality, but none of it really competes with the best of the freeware and open source competition. Still, with a footprint of under 70MB it's relatively small, and if your needs are simple then the suite might be good enough.