Blue Obelisk Data Repository - your one stop place of element and isotope data.

The official sources for the RDKit library

The Chemistry Development Kit

Open Babel is a chemical toolbox designed to speak the many languages of chemical data.

OpenVnmrJ. Build tools and instructions are at ovjTools.

Parsers and algorithms for computational chemistry logfiles

📖🔬☕ BioJava is an open-source project dedicated to providing a Java library for processing biological data.

Java programs for the NMReDATA format

Open-source foundation of the user-sponsored PyMOL molecular visualization system.

maestro file parser

Chemical 2D structure editor application/applet based on the Chemistry Development Kit

Avogadro is an advanced molecular editor designed for cross-platform use in computational chemistry, molecular modeling, bioinformatics, materials science, and related areas.

Open Parser for Systematic IUPAC Nomenclature. Chemical name to structure conversion

RDKit related blog posts, notebooks, and data.

Web-based molecule sketcher

3D Molecular Viewer

Universal cheminformatics toolkit, utilities and database search tools

OSCAR (Open Source Chemistry Analysis Routines) is an open source extensible system for the automated annotation of chemistry in scientific articles.

Tools and libraries to build OpenVnmrJ.

Computer-Aided Structure Elucidation software LSD

Simplified and standard interface to a number of cheminformatics toolkits

Driver for the LSD software, including Variable Status Atoms and solution ranking

Tutorials to learn how to work with the RDKit

MSDK source code repository

The OpenSMILES specification

Molecule Validation and Standardization

Bioclipse Git Repository for JOELib, http://joelib.sf.net/.

Open Standard for the SMARTS chemical query language (Extends OpenSMILES)

Essential Cheminformatics