Bookmarking is a way to manage or organize the web address(URL) of a Web page so that you can easily read the web page whenever you want to read it again. Bookmarking is also used for SEO (search engine optimization) purpose to generate backlinks.

Below are the list of top bookmarking sites and app:

1. StumbleUpon: StumbleUpon is a discovery engine that allows users to find new web pages and share their favourite webpages.

2. Delicious: Delicious is one of the popular bookmarking site which allows users to save their favourite links.

3. Zootool: Zootool allows users to bookmark your favourite images, videos documents and links from all over the internet.

4. Diigo: Diigo (Digest of Internet Information, Groups and Other stuff) allows users to save personal information.

5. Aviary Falcon: Aviary Falcon is a online image markup tool.

6. Netvouz:Netvouz is a social bookmarking service that allows you to save your favorite links online and access them from any computer, wherever you are.

7. Reddit: A place where users can explore new links and post their favourite links too.

8. Newsvine: An opensource news service which allows users to customize the view, also users can share their own news and also seed which get linked to orginal source of news.