CHED software (39 Mb) - powerful Windows-based chemical and spectral database processing tool. You can get free version of this software (with restricted import-export functionality) and search for any information about interesting compounds. CHED has extended features for chemical search.

ReactDB.dll - (450 Kb zipped) new dynamic library working with CHED. Adds a new data object "Chemical reaction". Supports and makes store and search processes possible for chemical reactions. Many useful features are included (semiautomatic atom-atom mapping, mistake's revealing options and more). Use it "as is" (for free) without any licenses and questions. Any suggestions are appreciated. Check for the latest version!

ChemSRV application - (500 Kb zipped) a small application for chemists to manage your own databases with chemical reactions within MDL "rdf" files. Workes on any local or remote MS Windows machine over HTTP protocol. Extract to any folder and run "chemsrv.exe". Then type "http://localhost/" in your web browser (Internet Explorer). Sun JAVA JRE must be installed to draw reactions.