Chemistry Development Kit
|Developer(s)||The CDK Project|
|Initial release||11 May 2001|
|Stable release||1.4.19 (August 5, 2013[±])|
|Preview release||1.5.6 (April 27, 2014[±])|
|Written in||Java (programming language)|
|License||GNU Lesser General Public License|
The CDK was created by Christoph Steinbeck, Egon Willighagen and Dan Gezelter, the developers of Jmol and JChemPaint at the time, to provide a common code base, on 27–29 September 2000 at the University of Notre Dame. The first source code release was made on May 11 of 2011. Since then more than 75 people have contributed to the project, leading to a rich set of functionality, as given below. Between 2004 and 2007 CDK News was the project's newsletter of which all articles are available from a public archive. Due to lack of a steady stream of contributions, this newsletter was put on hold.
Later, unit testing, code quality checking, and JavaDoc validation was introduced. Rajarshi Guha developed a nightly build system, called Nightly, which is still in operation at Uppsala University. In 2012, the project became a support of the InChI Trust, to encourage continued development. The library uses JNI-InChI for the generation of InChIs. In April 2013 John May joined the ranks of release managers of the CDK, taking care of the development branch.
The CDK itself is a library, instead of a user program. However, it has been integrated into various environments to make its functionality available. CDK is currently used in several applications, among which the R (programming language), CDK-Taverna (a Taverna workbench plugin), Bioclipse, and Cinfony. Additionally, CDK extensions exist for KNIME and for Excel, called LICSS (excel-cdk).
In 2008 bits of GPL-licensed code were removed from the library. While those code bits were independent from the main CDK library, and no copylefting was involved, to reduce confusions among users, the ChemoJava project was instantiated.
- 2D diagram editing and generation
- 3D geometry generation
- substructure search using exact structures and SMARTS-like queries
- QSAR descriptor calculation 
- fingerprint calculation
- force field calculations
- many chemical input/output formats, including SMILES, CML, and MDL formats
- structure generators
- International Chemical Identifier support (via JNI-InChI)
- protein active site detection
- cognate ligand detection
- metabolite identification
- pathway databases
- Bioclipse — an Eclipse/RCP based chemo-/bioinformatics workbench
- Jmol — Java 3D renderer (applet and application)
- JOELib — Java version of OpenBabel/OELib
- JChemPaint — Java 2D molecule editor (applet and application)
- Blue Obelisk
- Steinbeck, C.; Han, Y.Q.; Kuhn, S.; Horlacher, O.; Luttmann, E.; Willighagen, E.L. (2003). "The Chemistry Development Kit (CDK): An open-source Java library for chemo- and bioinformatics". Journal of Chemical Information and Computer Sciences 43 (2): 493–500. doi:10.1021/ci025584y. PMID 12653513.
- Spjuth, O.; Berg, A.; Adams, S.; Willighagen, E. L. (2013). "Applications of the InChI in cheminformatics with the CDK and Bioclipse". Journal of Cheminformatics 5 (1): 14. doi:10.1186/1758-2946-5-14. PMID 23497723.
- Guha, R. (2007). Journal of Statistical Software 18: 1–16.
- Kuhn, T.; Willighagen, E.L.; Zielesny, A.; Steinbeck, C. (2010). "CDK-Taverna: an open workflow environment for cheminformatics". BMC Bioinformatics 11: 159. doi:10.1186/1471-2105-11-159. PMC 2862046. PMID 20346188.
- O'Boyle, N.M.; Hutchison, G.R. (2008). Chemistry Central Journal 2.
- Beisken, S.; Meinl, T.; Wiswedel, B.; De Figueiredo, L. F.; Berthold, M.; Steinbeck, C. (2013). "KNIME-CDK: Workflow-driven Cheminformatics". BMC Bioinformatics 14: 257. doi:10.1186/1471-2105-14-257.
- Lawson, K. R.; Lawson, J. (2012). "LICSS - a chemical spreadsheet in microsoft excel". Journal of Cheminformatics 4 (1): 3. doi:10.1186/1758-2946-4-3. PMC 3310842. PMID 22301088.
- Steinbeck, C.; Hoppe, C.; Kuhn, S.; Floris, M.; Guha, R.; Willighagen, E.L. (2006). "Recent developments of the chemistry development kit (CDK) — an open-source java library for chemo- and bioinformatics". Curr. Pharm. Des. 12 (17): 2111–20. doi:10.2174/138161206777585274. PMID 16796559.
Guangli M, Yiyu C (2006). "Predicting Caco-2 permeability using support vector machine and chemistry development kit". J Pharm Pharm Sci 9 (2): 210–21. PMID 16959190.
- Peironcely, J. E.; Rojas-Chertó, M.; Fichera, D.; Reijmers, T.; Coulier, L.; Faulon, J. L.; Hankemeier, T. (2012). "OMG: Open molecule generator". Journal of Cheminformatics 4 (1): 21. doi:10.1186/1758-2946-4-21. PMC 3558358. PMID 22985496.
- Bashton, M.; Nobeli, I.; Thornton, J. M. (2006). "Cognate Ligand Domain Mapping for Enzymes". Journal of Molecular Biology 364 (4): 836. doi:10.1016/j.jmb.2006.09.041. PMID 17034815.
- Rojas-Cherto, M.; Kasper, P. T.; Willighagen, E. L.; Vreeken, R. J.; Hankemeier, T.; Reijmers, T. H. (2011). "Elemental composition determination based on MSn". Bioinformatics 27 (17): 2376–2383. doi:10.1093/bioinformatics/btr409. PMID 21757467.