Pre-Grade Your Paper: Free Online Grammar Checker, Proofreader, and More
"PaperRater.com is a free resource, developed and maintained by linguistics professionals and graduate students. PaperRater.com is used by schools and universities in over 46 countries to help students improve their writing.
PaperRater.com combines the power of natural language processing (NLP), artificial intelligence (AI), machine learning, information retrieval (IR), computational linguistics, data mining, and advanced pattern matching (APM). We offer the most powerful writing tool available on the internet today."
It is a free service that allows you to visually capture any part of a web page. As you collect items that you captured, you organize them in boxes. You can then share these items or boxes with friends, colleagues, ... the world. The result is: efficient and visual collaboration around content. We call it: "Content Networking".