SigViewer can help you to view and analyze electroencephalogram signals. It is an open source software library for biomedical signal processing, featuring for example the analysis of biosignals such as the electroencephalogram (EEG), electrocorticogram (ECoG), electrocardiogram (ECG), electrooculogram (EOG), electromyogram (EMG), respiration, and so on. Major application areas are: Neuroinformatics, brain-computer interfaces, neurophysiology, psychology, cardiovascular systems and sleep research.

The aim of the BioSig project is to foster research in biomedical signal processing by providing open source software tools for many different applications. Generally, many concerns have to be addressed in this scientific field. BioSig handles this by providing solutions for data acquisition, artifact processing, quality control, feature extraction, classification, modeling, data visualization, and so on. Everything in this project is freely available under the GNU General Public License.

For Users
1. Bug tracking system
2. Mailing list
3. Supported dataformats
4. Documentation and function reference

For Developers
1. Bug tracking system
2. Mailing list
3. SourceForge.net project info
4. SVN Repository
5. To get the latest developement version use SVN checkout
6. svn co https://biosig.svn.sourceforge.net/svnroot/biosig/trunk/
7. Encoding of events
8. Specification of the GDF v2.0 format - the recommended data format for writing biosignal files
9. All parts in this project are free according to the GNU General Public License. No non-free software will go into this project. Please help to make sure this is always the case.
10. The programs should run on plain Matlab (no toolboxes) and Octave. For this reason, do not use any fancy features of Matlab (e.g. classes or special toolboxes).
11. The TSA and NaN toolboxes should be part of the environment.
12. Missing values (e.g. due to artifacts) can be encoded as NaNs. If you work on signal processing methods, you should take into account that you might need to work with NaNs.

The license of this software is Free, you can free download and free use this cad software.