ANNIS2 is an open source, versatile web browser-based search and visualization architecture for complex multilevel linguistic corpora with diverse types of annotation. ANNIS, which stands for ANNotation of Information Structure, has been designed to provide access to the data of the SFB 632 ("Information Structure: The Linguistic Means for Structuring Utterances, Sentences and Texts").
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.
GATE (General Architecture for Text Engineering) is a sophisticated framework that allows manual and automatic annotation as well as the processing of all kinds of language resources. GATE has a broad community of users and developers, and comes with diverse plugins for specific linguistic tasks.
VARD 2 is an interactive piece of software produced in Java designed to assist users of historical corpora in dealing with spelling variation, particularly in Early Modern English texts. The tool is intended to be a pre-processor to other corpus linguistic methods such as keyword analysis, collocations and annotation (e.g. POS and semantic tagging), the aim being to improve the accuracy of these tools.
WebLicht is a service-oriented architecture (SOA) for creating annotated text corpora. Development started in October 2008 as part of CLARIN-D's predecessor project D-SPIN, and further development and enhancement of WebLicht is an important goal of CLARIN-D, aiming to make WebLicht a fully-functional virtual research environment.