Capture by Techulus - The ultimate toolkit for converting HTML to image & PDF. Pay only for what you need.No Subscription.

Openfire - Openfire (formerly Wildfire) is a cross-platform instant messaging (IM) and groupchat server.

Screenshot Machine - Screenshot machine is an online website capturing service. Creates a screenshot or thumbnail of any online web page in couple of seconds for free.

Apache Vysper - Apache Vysper aims to be a modular, full featured XMPP (Jabber) server.

Urlbox.io - Screenshot full page websites in retina resolution with Urlbox.io screenshot as a service API. Urlbox is the best provider of automated website screenshots offering many unique options and features.

Matrix.org - Matrix is an open standard for decentralized persistent communication over IP.