If your business needs a web site or a landing page, you'll love Bitrix24.Sites. First, all of our free templates are responsive, meaning they automatically adjust to the device they are being viewed with. This is increasingly important, since the share of mobile traffic now exceeds that of desktop and Google has decided to factor mobile accessibility into the SERP ranging formula. So, if you want free mobile and search engine traffic, your site absolutely has to be responsive (aka bootstrap).
Second, Bitrix24 comes with a free web site builder, meaning that you can easily edit templates in order to create sites and landing pages without any HTML or CSS knowledge. We'll host your web sites and landing pages on Amazon Web Servers absolutely free of charge (unlimited bandwidth). You can either use http://bitrix24.site domain for hosting or connect your own domain.
Third and most important, Bitrix24.Sites is a part of a larger sales and marketing automation platform that comes with web form builder, live chat widget, lead generation, email marketing, invoicing, customer support, planning and project management tools. And those are free, too.
Bitrix24 CRM manual is available here.
If you are interested in buying self-hosted editions of Bitrix24, which come with API, CMS and source code, can be easily customized and integrated with other tools, please download a trial version here.