The cross-platform Advene application allows users to easily create comments and analyses of video documents, through the definition of time-aligned annotations and their mobilisation into
automatically-generated or user-written comment views (HTML documents). Annotations can also be used to modify the rendition of the audiovisual document, thus providing virtual montage, captioning, navigation... capabilities. Users can exchange their comments/analyses in the form of Advene packages, independently from the video itself.

Annozilla allows you to view and create annotations associated with a web page. To use Annozilla you need to install the packages and get set up with an account with the W3C test server.

This online tool can be used for a wide variety of annotation tasks, including visualization and collaboration.

brat is designed in particular for structured annotation, where the notes are not freeform text but have a fixed form that can be automatically processed and "interpreted" by a computer. brat also supports the annotation of n-ary associations that can link together any number of other annotations participating in specific roles. brat also implements a number of features relying on natural language processing techniques to support human annotation efforts.

Co-ment is a text annotation and collaborative writing tool. Co-ment provides a friendly graphic user interface for text annotation, collaboration and writing texts online.

This is a simple tool for creating custom notetaking sheets (ie blank, ruled, or graph style). You may automate the generation of the sheets to customize them with your name, date etc.

Digress.it is a WordPress plug-in that allows paragraph-level commenting in the margins of a text. Use digress.it as a collaboration tool for blog-style comment threads off individual paragraphs. Host your project on digress.it or download it for use with your own WordPress installation.

Domeo is an extensible web application enabling users to visually and efficiently create and share ontology-based stand-off annotation on HTML or XML document targets. The tool supports manual, fully automated, and semi-automated annotation with complete provenance records, as well as personal or community annotation with access authorization and control.

Editors' Notes is an open-source, web-based tool for recording, organizing, preserving, and opening access to research notes, built with the needs of documentary editing projects, archives, and library special collections in mind.

eLaborate is a digital tool for the creation and research of texts online. Researchers may create websites, individually or with collaborators, on the transcription and edition of a text. The born-digital editions the user creates may then be transferred over to a freely-accessible website for better navigation and simple search.