If you are looking for quick profiles of companies, check out CabinetM which focuses on Martech but also covers a fair number of SalesTech firms.

Anita Brearton and Sheryl Schultz—known, among other things, for together heading up the Boston chapter of angel group Golden Seeds from 2009-2011—have now teamed up again, in a bid to make the marketing tech universe less overwhelming. Their Boston startup is CabinetM, which just launched a site for discovering new marketing software and quickly digesting what you need to know.

To help marketers deliver ROI in the form of revenue, reduced cost of acquisition, and/or customer lifetime value, the industry has created an abundance of tools that can be used to find, target, influence, and track customer activity and engagement.