Is there any free online service that converts .pdf to .ppt,.xls and .doc decently? If not, what about a lightweight, free program?
try this site:
includes almost everything related to file type conversion.
NitroPDF offers free conversion to DOC/RTF and XLS
as for PowerPoint I found the following site, although I never tested it
For offline conversion with software/tools I only know of AnyBizSoft products (none-freeware, http://www.anypdftools.com). However, it would be good to know which operating system you are using ~ maybe someone knows of a decent freeware for the job.
usability of the converter file will vary depending on the source pdf