If you are looking for free lead capture tools, you'll love Bitrix24, because we have all the tools you need in one place. Lead capture forms and lead capture pages? Check. Email lead capture? Got that. Lead capture from social networks and popular messengers? Absolutely. Phone number capture? You shouldn't be asking.
Free isn't the only Bitrix24 advantage. Not only Bitrix24 captures leads for you, it's actually a full featured CRM system. You can distribute leads among your agents, run lead nurturing campaigns, score leads, push leads through your sales funnel, convert leads to contacts, deals, quote and invoices - and that's not even half of what Bitrix24 CRM does for you. We even have mobile lead capture apps for iOS and Android.
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.