Found very nice web-site (Mandasoft) in the Linkedin Deal flow source. Devoted totally to the merge and acquisition of the companies. The overall impression of the service is really great but the search results are quite noisy, seems for me that it is simple text search with some organization of the search results in groups: Transactions, Tombstones, Trends, etc. Still, that is the prefect way to see some trends in developing the new software and starting the company that you can sell (esp. in the chemoinformatics and molecular modeling).
PS: The name of the company is offensive in Russian language.