Just thought I would post this list of applications which can be run in a web browser rather than needing to install any software on your computer. I find these very useful when I am using someone elses machine or from pc's where I do not have admin rights.
Edit PDF files or fill in PDF files.
Join two PDF's
Upload a PDF and turn it into Text.
Saves files back to your machine either in jpg format or its own layered high quality format.
HDR Image tool
Converts three differently exposed images to a single HDR image.
Music Notation Editor
(requires sign up)
Ebook Reader (will read a book without downloading it if you have the URL of the ePub file)
Audio File Converter
http://www.convertfiles.com/ (also does video)
Convert Word document to eBook format
Compare two versions of the one document
Spotify (requires you to be logged into Facebook)
Image hosting for forums
File Unzipping tool
Create Slideshow Video from Photos
https://www.youtube.com/editor (free account required)
Click on camera icon to add pictures, music icon to add royalty free music, transitions icon to add transitions then hit the create video button.
Create video from MP3 and upload to Youtube
There are lots of others out there, but these are the ones I use most.