Google is expected to launch its own web-based presentation software, reports Read/Write Web.

The product, called Presently by all accounts, has been rumored and anticipated for some time now. In June the company bought Zenter, a company that developed presentation-building software and Google has mentioned something was coming, likely landing in late summer.

The addition of a Powerpoint analog in the Google Apps online suite would be one more bit of ammunition against Microsoft for productivity market share.