★The rating 4.9★ period calendar! Popular in 63 Countries.Trusted by 300 million Users. Keep track of your menstrual cycles with Period Calendar. It tracks your periods, cycles, ovulation and the chance of conception. Period tracker helps both women looking to conceive and those trying to birth control. Period Tracker is useful, whether you have irregular perio...

BKChem is a vector graphics application, developed on Python, that lets you create a schematic representation of a chemical compound by hand. Editing compounds is really easy, thanks to bond-by-bond drawing and restrictions in their length and angle. It supports linear formulas, charges, and radicals. You don't need to draw every single compound by hand; BKChe...

VirtualDub is one of the best free tools to capture videos and apply all kinds of modifications to its properties. If you are looking for a tool similar to Adobe Premiere to set up sequences, you are in the wrong place; this is not VirtualDub´s function. Cut and paste segments, transcode the file or apply all kinds of filters are three operations you can do with V...

You can use Prezi Desktop to create 'prezis' (PowerPoint presentations) on your computer without an internet connection. You can save the presentations on your computer or upload them to Prezi.com if you want to work on them or share them online. Prezi is a tool that allows you to go far beyond the simple, classic presentations that you can make in PowerP...

The best dating app to let you really be you and choose how you want to date online. Forget the days of awkward online dating and become a POF member, where you can come exactly as you are. We’re here to help you create the same magic online that you would IRL. We know online dating isn’t one-size-fits-all, so we let you choose your own adventure and connect...