You could try OpenSpritz. It's based on Spritz and is a bookmarklet and runs in your browser. It is quite limited but should suffice for light reading.
Provides a clean overlay to read from
Offers a range of different reading speeds ranging from 200WPM - 950WPM
You can choose which sections of the page to read
Only works on plain text pages, ...
Challenger Comics Viewer allows you to scroll incrementally as well as page by page, (I think that is what you are really asking for), so that more than one image is visible on the page at a time.
Supported formats are JPG, PNG, GIF, WebP (Android 4.0+), BMP, PDF, CBZ/ZIP,CBR/RAR and ePUB
2 display modes (Simple View which displays pages one by one and ...
You could use Stylish (FF) --- Chrome and install user styles built for darkness. I'm personally using a few 'skins' on Firefox and Pale Moon. Some sites are a bit buggy and require you to exclude sites from time to time.
I'm using Black Web and ...
Just for completeness, let me repeat the recommendation I gave on Android.SE:
There's EPUB3 Reader available on F-Droid and Github (not on Google Play – though an app using the same package name exists there, it's not the same, but obviously based on the original developers engine; long story behind that, not fitting here). Its app description explicitely ...
Two extension pops up when searching and those are the extensions:
Blank your monitor easy readin - Blank Your Monitor provide a simple mechanism to change Firefox color combination in order to invert the usage of white and black colors
Dark backgrounds switcher - Easily switch the color of foreground (text) to yellow/white and background to black. The ...
I tried a lot of cbz readers and found only two apps that do this: Xodo PDF Reader & Editor and Challenger Comics Viewer.
Of the two, I prefer Xodo as it has a modern design and in general feels more responsive. Challenger does seem to have more in the way of customisation, though.
I created and maintain an open source extension called Just Read which makes reading articles a lot more pleasant. It has an attractive built in theme but allows you to customize the theme or add your own completely new one.
It has features such as
Removal of superfluous material such as ads, popus, comments, and styling
A GUI editor of the default theme
I would suggest you another alternatives:
Someone has already mentioned this extensions.
Pocket used to help people save interesting articles, videos and more
from the web for later enjoyment. Once saved to Pocket, the list of
content is visible on any device — phone, tablet or computer. It can
be viewed while waiting in line, on the couch,...
Adobe Acrobat/Reader and Foxit PhantomPDF/Reader have "shared review" functionality that does something similar to what you have suggested with PDF files - comments made by one person are automatically shared to all other people participating in the review. However, there's no chat functionality, and at least one person needs to have the paid software (...
I think the best option is to use Heyzine, it's a pdf to flipbook converter.
You can create a flip book and embed it on your site without having to learn anything and without plugins. If you don't want to link external sites, it also allows you to download the html flipbook.
In case you need to convert more than one PDF, it has an API to make conversions ...
I recommend the Just Read extension by Zach Saucier (he's active on Stack Overflow and Graphic Design as well), available for Chrome at https://chrome.google.com/webstore/detail/just-read/dgmanlpmmkibanfdgjocnabmcaclkmod?hl=en
It is open source, actively developed, and also has a premium version with even more features.
Just Read's description:
With one ...
If you are reading pdfs on a Mac you could try Skim. It has a reading bar which by default focuses on one line. You can also change the colour in the menu item: Skim>Preferences>Display.
You can also "invert" the bar so that the rest of the text is hidden.
As far as I know you need to drag the bar from one line to the next with the mouse.
There is a quick ...
Xodo fulfills the requirements; it supports:
two-pages horizontal scrolling (which matches reading from a magazine)
is touch based.
It has some minor rough edges (my major complaint being not supporting automatic vertical fit), but does the job well.
No idea about RSS, but I'm personally use iBooks from Apple itself to read PDF files. Is has some nice ideas like switching to black background when the light sensor of your iOS device detects that the surrounding is dark.
Tried Master PDF Editor? Though it's not open source (only noticed the tag months after first answering), and it looks like it uses a mostly paid-only model except for Linux that still has a "Free for non-commercial use" version (hidden on their website very well, after the "download for Linux" link) it's still the best PDF editor for Linux I've found.
Evernote clearly seems to be a good replacement for the readability extension. It was tested on Ubuntu 14.04 using Chrome version 42.0.2311.135.
You may need to restart your browser after adding the extension. Also installing the Evernote webapplication would be an option to transfer clips from Evernote clearly to a central Evernote repository.