Liner!

Instapaper is a simple tool to save web pages for reading later. To save web pages for later offline reading: go to Instapaper.com, install the Read Later bookmark, and mark any pages you'd like to read later.

We think simple tools can help us all improve the quality of information on the Internet and in the greater world around us.

scrible lets you highlight and annotate web pages and easily save, share and collaborate on your web research with others.

The Knowledge Juicer is a tool that leverages hierarchical underlinings to extract multiple levels of summary out of digital texts.This makes reading, learning and studying significantly simpler and faster: subsequent readings become much more efficient through an easy navigation interface. It allows for easy tracking and saving of important topics, and they will become easily re-accessible in a few clicks from multiple platforms and to multiple users.

Highlight the web to share the important parts. Save and share highlights, right as you read. Highly works on nearly every app and website.

Genius lets you add line-by-line annotations to any page on the Internet with a Chrome extension, a bookmarklet, or server-side site-enabled annotations.

Pull lets you highlight great quotes and share them as sleek images. Simply select text from the web in Safari and use the Pull Action Extension to get started. You can also access a history of previous Pulls so you can share them again and again.

Juntoo lets web pros save time & money by letting them collect feedback from clients and project stakeholders directly on live web pages instead of through endless email loops and annotated PDFs.

Memomi - the Google Chrome Extension for saving text for later and get awesome reminders each time you open a new Chrome browser tab.

Marker.to is a simple annotation tool. Have you ever used a marker pen for highlighting your paper documents?