CP2K

  • Level of openness 3 ★★★
  • Document quality 3 ★★★

An open-source first-principles calculation library for pseudopotential and all-electron calculations. One of or a mixture of Gaussian and plane wave basis sets can be used. A lot of the development focuses on massively parallel calculations and linear scaling. The user can choose various calculation methods including density functional theory and Hartree-Fock.

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CRYSTAL

  • Level of openness 0 ☆☆☆
  • Document quality 3 ★★★

A first-principles simulation program based on the pseudopotential method utilizing Gaussian basis sets. It can perform simulations based on Hartree-Fock and density functional theories. It can be run under Unix/Linux, and also provides a simple GUI for Windows. Binaries are distributed for a fee, but users can first try the evaluation copy.

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ChemSpider

  • Level of openness 3 ★★★
  • Document quality 3 ★★★

ChemSpider is a free chemical structure database that provides fast access to over 100 million structures, properties, and related information, and is operated by the Royal Society of Chemistry.

By integrating and linking compounds from hundreds of high-quality data sources, ChemSpider makes it easy to find chemical data from diverse data sources that are freely available for online searching. Users can also add and manage data in a wikipedia-like fashion. Meanwhile, manual curation by the Royal Society of Chemistry continuously improves data quality.

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CTM4XAS

  • Level of openness 2 ★★☆
  • Document quality 3 ★★★

An application for X-ray spectroscopy analysis based on atomic multiple-state calculation. This application performs multiplet calculation for transition-metal and rare-earth elements by taking into account effect of crystal fields and charge transfer, and can determine physical parameters by comparison between theory and experimental data via fitting. It implements useful graphical user interface(GUI), realizing intuitive operation.

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CASTEP

  • Level of openness 0 ☆☆☆
  • Document quality 3 ★★★

Software for first-principles calculation based on pseudo-potential and plane-wave basis. This software performs electronic-state calculation of various systems by density functional theory, and can treat structure optimization, excited-state analysis, and so on. This software can be applied to many physical phenomena such as catalysis reaction, calculation of phase diagram, etc. There are many users of this payware in the world.

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