OpenOffice 3 contains the standard office tools with the addition of a few extra tools to help out. The key players in the OpenOffice suite are:
oowriter: This is the word processor of OpenOffice. This word processor will open and save in nearly all Microsoft Word formats. As of release 3, the docx format can now be opened in OpenOffice with some small issues (mostly pertaining to track changes and comments.) The oowriter tool matches MS Word nearly feature for feature. On top of matching features, oowriter does an outstanding job of matching the user interface so that using oowriter is very similar to using MS Word.
oocalc: This is the spreadsheet application. Like oowriter, oocalc matches the Microsoft equivalent feature for feature. The OpenOffice spreadsheet program does an outstanding job of opening and saving Excel spreadsheets.
ooimpress: This is the presentation application. Any PowerPoint user will feel right at home with 'Impress'. Not only do the applications share a similar look, they share a similar feel, and Impress does open and save PowerPoint documents with ease. Impress also has the native ability to save presentations as flash documents so they can be placed online to be viewed via web browsers.
oobase: This is the database portion of OpenOffice. As with MS Access, OpenOffice Base is one of the more complex applications within the OpenOffice suite of tools. This is the one aspect of OpenOffice where importing of the Microsoft equivalent (Access) is not 100%. But creating a database from start to finish with oobase offers as complete a package as MS Access.
oomath: This portion of OpenOffice allows you to create formulas that can be embedded into various tools or exported as pdf documents.
oodraw: This is a vector graphics tool similar to Microsoft Publisher. Although not nearly the quality (or containing the capabilities) of The Gimp, oodraw is an outstanding tool for desktop publishing, page layout, and typography.
ooweb: This is the web editor of OpenOffice. The ooweb application enjoys the same layout as oowriter but adds the necessary web-layout and viewer tools necessary for basic web design. This tool is primarily for basic web editing. It is a WYSIWYG designer similar to MS Frontpage.