Ideas Grab - A list of +3400 ideas that you can get for your projects.
Coupofy - Coupofy is USAs number 1 trustworthy deals and coupons website.
The 25 Days of Ideas - Free resources for coming up with startup ideas
Giftwhale - Giftwhale allows you to create personalised wish lists online.
Validated ideas - List of 5,000 poorly executed but popular apps
TrackIf - Alerts you if the price of your favorite products drop