Office Suite Premium for iOS (iPad, iPhone, etc) is now free down from the usual price of $25. This program is quite good for Word, Excel and PDF Document Editing.
Tracker.
Website with App details here.
From the developers:
The latest version of OfficeSuite brings the power and capability of a desktop app to the iPhone and iPad like never before! This is the perfect tool for effortlessly viewing, editing, creating and sharing Word, Excel, PowerPoint documents and converting them to/from PDFs.
WHAT MAKES OFFICESUITE BETTER THAN ALL OTHER EDITORS
* Extremely fast and easy to use
* Desktop-inspired user interface - combines familiarity and mobile productivity
* No storage cloud lock-in. Supports Google Drive, Dropbox, Box, OneDrive and iCloud. No complex synchronizations - direct opening and saving to/from the cloud
* Full editor for Microsoft Word, Excel and PowerPoint documents
* Edit, annotate and save PDF documents - convert PDFs to Word/Excel, make changes, insert notes and comments, then save PDF document without losing the formatting
* Simply view and edit RTF and CSV file formats
* Supports all Microsoft Office file formats
* Printing support
* Auto-correct while typing
* Extra font pack - 70+ popular fonts now included
* Add camera photo - include pictures in your documents to aid your note taking
* Password protection - set a password for your PDFs and the app for extra security
* NEW! Open ODF files
* NEW! A gallery of Word, Excel and PowerPoint templatesDOCUMENT HIGHLIGHTS:
* Supports .doc, .docx, .docm, .rtf, .txt, .log file formats
* Advanced formatting (fonts, bullets and numbering, tables and pictures)
* Search/Replace feature to easily perform large-scale editing
* Convenient page navigation (zoom, page finder and edit/view modes)
* NEW! Support for document templates
* NEW! Open .odt filesSPREADSHEET HIGHLIGHTS:
* Supports .xls, .xlsx, .xlsm, .csv file formats
* Advanced formatting (cell styles, borders, numbering, font color and style)
* Freeze/unfreeze columns and rows, insert and edit charts and pictures
* Multiple sheet support for large documents
* NEW! Support for spreadsheet templates
* NEW! Open .ods files
* NEW! Support for Scatter chart type
* NEW! Conditional formatting
* NEW! Insert chart as new sheetPRESENTATION HIGHLIGHTS:
* Supports .ppt, .pptx, .pps, .ppsx, .pptm, .ppsm file formats
* Advanced formatting (insert and reorder slides, adjust pictures, text and shapes)
* Create manual and automatic slideshows and support transition types
* Navigate easily using the Slide Carousel, Search, Zoom, and Go to Slide features
* NEW! Support for presentation templates
* NEW! Open .odp files
* NEW! Create and edit transitionsPDF HIGHLIGHTS:
* Annotate and save PDF documents without losing the formatting
* Regular and full-screen support
* Swipe between pages using the Page Carousel
* Navigate easily using the Search, Zoom, and Go to Page features
* Print and share documents
* NEW! Continuous page view