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.
PDF Tools
http://www.pdfescape.com/open/
Edit PDF files or fill in PDF files.
http://foxyutils.com/mergepdf/
Join two PDF's
https://smallpdf.com/unlock-pdf
Unlock or remove password from PDF
https://www.pdfonline.com/convert-pdf-to-html/
Convert PDF to HTML
https://pdf2docx.com/
Convert PDF to Word DOCX
Online OCR
http://www.onlineocr.net/
Upload a PDF and turn it into Text.
Grammar and style checker
http://www.hemingwayapp.com/
Compare document versions
https://draftable.com/
Publish Google Docs to the Web
https://gdoc.pub/
Image Editors
https://www.photopea.com/
http://www.pixlr.com/editor/
Saves files back to your machine either in jpg format or its own layered high quality format.
Make images using script fonts
https://fontmeme.com/script-fonts/
HDR Image tool
http://www.yohdr.com/
Converts three differently exposed images to a single HDR image.
Image Compressor
https://compressor.io/
Works for jpg, gif, png and svg images
Make Graphical Images for Twitter and Facebook
https://pablo.buffer.com
Music Notation Editor
http://www.noteflight.com/login
(requires sign up)
HTML Editor
http://www.quackit.com/html/online-html-editor/full/
Ebook Reader (will read a book without downloading it if you have the URL of an ePub file)
http://www.magicscroll.net/
Video Converter
http://www.filewiggler.com/
Video Downloader
http://savevideo.me/
Convert Video to GIF
https://www.zamzar.com
Download and Convert Youtube Videos
https://www.onlinevideoconverter.com
Crop GIF to a square or reduce file size for Twitter
https://ezgif.com/crop
Audio File Converter
http://www.convertfiles.com/ (also does video)
Convert Word document to eBook format
http://ebook.online-convert.com/
Extract photos and text from a Word document
https://products.aspose.app/words/parser
Convert PDF to Word format
http://pdf2docx.com/
Compare two versions of the one document
http://www.comparemydocs.com/
Invoice Generator
https://invoice-generator.com
File transfer
https://www.wetransfer.com/
https://uploadfiles.io/
FTP
http://www.net2ftp.com/
Spotify (requires you to be logged into Facebook)
https://play.spotify.com
Image hosting for forums
https://www.anony.ws
File Unzipping tool
http://online.b1.org/online
Online Video Editor
https://clideo.com/merge-video (allows some editing and merging of clips but adds watermark)
https://spark.adobe.com
Create video from MP3 and upload to Youtube
https://www.tunestotube.com/
Unzip a file
https://unzip-online.com/en
Test DNS
https://manytools.org/network/query-dns-records-online/go
Remove EXIF Data from a photo
https://www.exifremove.com/
There are lots of others out there, but these are the ones I use most.