JPEG to PDF is a free program that can convert JPG images into a PDF file (or multiple PDF files) quickly and easily. It is a small, portable program that does not require installation.

PDF to Excel Free is a free web service that is specifically designed to convert PDFs with lots of data tables into Excel files. It will automatically detects data tables, transfer them into Excel format, and recreates their formatting and appearance. Conversion is performed remotely on the site; you will have to upload your file and provide an email address where a link to download the converted file will be emailed back to you.

PDF to Word Free is a free web service that offers high-quality conversions of PDF files to DOC or RTF formats that can be used in Microsoft word or other Rich Text Editors. It lets you upload PDF files through a web interface and will then send the converted file via email as an attachment.

PDF Split and Merge 2.0 is a powerful free PDF editing program that can split, merge, and extract PDF documents. It employs a visual editing interface that allows users to drag and drop thumbnails of pages to arrange or combine them, and to edit pages (rotate, delete, etc) by right clicking on them.

Impressive is a free multi-platform app that can display any PDF file or folder containing image files (JPEG, PNG, TIFF and BMP) as a slideshow presentation. It can be used to present PDFs or images as full-screen PowerPoint-style presentations or it can function as a full-screen reader. “Impressive” also offers a combination of sophisticated slide transition effects and a number of practical presentation tools, including spotlight effects, box highlighting, zooming in, and an overview screen that displays slides as thumbnails and allows for quick navigation.

ComiX is free comic strip browser that downloads and displays more than 150 comic strips browsable by their publication date.

Some PDF to Word Converter is a free converts PDF into Word documents. It offers batch processing, a degree of customizablity for the output document, and very good overall performance. Most importantly, it is fully useable and does not require any registration or codes and does not expire within a certain time period.

WordFlashReader is an open source program that promises to increase your reading speed (of electronic texts) by multiple factors, as well as increase your comprehension of them. It will flash the words within a text in sequence (individually or in chunks) on the screen in large font, with pauses for punctuation. WordFlashReader can open and display multiple text and ebook formats.

ComicRack is a free comic ebook reader for CBZ, ZIP, CBR, RAR, TAR and PDF formats. It is designed as a full-feature reader with bells and whistles as well as being a manager for your library of comic ebooks and metadata. It can also convert ebooks to other ebook formats.

Free PDF to Word Doc Converter is a small, free program that can convert PDF files into DOC files used by MS Word. It can handle all elements of a PDF document including text, shapes and images.

"Ebook to Images" converts ebooks in most formats (.txt, .html, .htm, .lit, .pdf) to images that are custom formatted for reading on a mobile device. The idea is that while most portable devices such as MP3 players will not allow you to upload and view ebooks, many of them allow for image viewing on their screens. Hence "ebook to images" will convert the text from ebooks into images suitable for viewing on your particular portable device.