Salt

• language-independent
  Salt supports a huge set of languages and typesets. Each language which can be expressed in UTF-8 is supported by Salt.

• theory-neutral
  Salt is open to any linguistic school or theory, not limited to a specific one.

• tagset independent
  Salt is not bound to a tagset. Annotations are represented as attribute-value pairs and can be chosen freely.

• open source
  Salt is licensed under the Apache License, Version 2.0 and published on Github.

• multimedia support
  Salt is a text-based model, but also supports the modeling of audio and video corpora.

• annotation layer independent
  Salt is not limited to a specific set of annotation layers. Since Salt is a graph-based model, you can model many different structures, such as tree structures, span annotations, coreference chains and so on.

Want to know more?

• Homepage: http://corpus-tools.org/salt
• Code: https://github.com/korpling/salt
• Bug and issue tracking: https://github.com/korpling/salt/issues
• User guide and Javadoc https://korpling.github.io/salt/doc/
• User guide and Javadoc (Snaphot) documentation https://korpling.github.io/salt/doc-snapshot/