for NIH Molecular Libraries Program centers by assay submitter.
PubChem's data source information page can be found here.
Probe Reports (reported by Molecular Libraries website)
The Molecular Libraries Program website lists the publicly available Probe reports from all centers but has not been updated for a while. It can be found here. We keep our own up to date copy of Scripps' Center probes here.
Google Scholar Citations for PubMed
This tool will take a PubMed PMID and run a Google search to obtain the number of times it has been cited. The resulting Google Scholar link is inserted into the PubMed page as shown in the picture.
To use this tool you will need to be using the Firefox browser with the Greasemonkey extension installed. You can then install the tool here.
1,556 PubChem assays, 48,857,147 tested substances, 430,110 active substances, 72 probes and 141 publications, with 5435 citations