Sketches of 17th Century Hollanders is a website housing the "original research projects" of Cor Snabel and Elizabeth A. Johnson.
Among the original research projects are transcripts of various church records from Amsterdam and Cologne, as well as family sketches of seventeenth-century immigrants from the Netherlands to New Netherland, New York, the South (Delaware) River, and Virginia.
The website is created using a collaborative online workspace created by PBWorks. The Navigator pane on the top right corner is the place to start. It serves as an index and links to the various projects that have been added to the site.
Both Cor and Elizabeth are excellent, and careful researchers, and you will find the work on their site to be among most reliable and credible genealogical research found online today. Over the past couple of years the two have discovered ancestries for a number of immigrants to New Netherland that had previously been unknown. Check the index to see if you might find something new regarding one of your New Netherland ancestors.