Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Quoteplay - A tiny app that sends you one startup quote a day.
Tax990 - Tax 990 is an IRS-authorized e-filing solution for nonprofit organizations that helps clients understand the process of filing 990 series returns.
Startup Notes - Most actionable advice from each Startup School speaker
Qiqqa - Qiqqa is a free research and reference management software. It can be used in many organizational projects from the academic to the personal to the business endeavor. Read more about Qiqqa.
Mattermark Daily - A curated newsletter of blog posts from investors & founders