Andrew User Interface System

Free, medium featured (word processor; HTML, program and drawing editors; directory and help browsers; spreadsheet; mail/bulletin-board manager; application builder; scripting language), Unix. Open source.
http://www-2.cs.cmu.edu/~AUIS/

SimDesk Technologies, Inc.

STI offers a suite of office productivity tools accessed through the Internet. SimDesk contains software applications for word processing, data management, spreadsheets, personal scheduling, data communications, e-mail, and other business-to-business serv
http://www.simdesk.com/

Gobe Software, Inc.

Productivity suite for Windows with word processing, graphics, image processing, spreadsheets, charting, presentation and page layout.
http://www.gobe.com/

VistaSource: Applixware

Low cost, full featured (Words, Spreadsheets, Data, Presents, Graphics, Mail, Builder, Document Filters), MS Office compatible; Windows, Unix/Linux.
http://www.vistasource.com/

Seacrest Business Systems, Inc.

Provides Office software for the IBM AS/400.
http://www.seacrest.com/

Siag Office

Free, medium featured (PW, Siag, Egon, XedPlus, Gvu, Xfiler), Unix. Has sense of humor: word processor's name is Pathetic Writer.
http://siag.nu/index.shtml

Axene, Inc.

Free, medium featured (XAllWrite, XQuad, Xclamation, XMayday), Linux, Unix; English, French, German, Spanish. Trial downloads.
http://xibios.free.fr/

Ability Office 2000

Low cost, full featured (Write, Spreadsheet, Database, Photopaint), very good photo-editor. Evaluation download. Modules available separately. DOS, Windows, Linux port underway.
http://www.ability.com/

e-press corp.: EasyOffice 2001

Free and low cost, medium featured (EasyWord, EasySpreadsheet, EasyPresentation, Easy Contact Manager, Easy Web Page Creator, Easy Bookkeeper, Easy Speaker (voice recognition), Easy Bar Coder, Easy Help), MS Office compatible; Windows; English, (Pending:
http://www.e-press.com/

ThinkFree

Free, small, medium featured (word processor, spreadsheet, presentation, address book, e-mail client, file manager), use online or offline: promoted as usable from any computer with a web browser. MS Office compatible. Windows, UNIX/Linux.
http://www.thinkfree.com/

Software602: 602PC SUITE

A suite that is compatible with MS Office document types, comprising word processor, spreadsheet, photo editor, and digital photo organizer. Free for non-commercial use.
http://www.software602.com/products/pcs/index.html

Softease Ltd

Word processing, spreadsheet, database and desktop publishing solutions.
http://www.softease.com/

STB Office System: Virtual Office

Software for office and 'virtual office' management; services include: accounting, inventory, customer relationship/account management (CRM), project management, time registration, document control.
http://www.stb.nl/indexE.html