Zoom Meetings offers a video conferencing and messaging solution for desktop and mobile devices, that aims to be very quick and easy to set up, and offer a wide range of scaleable features.
Not only does it provide HD video and audio, but it can support up to 1,000 participants at the same time, and up to 49 videos on a single screen, though such large gatherings are probably best suited to big-screen monitors.
Meetings can be saved locally or to the cloud, along with transcripts that have searchable text to work with. Additionally, collaboration is built in with the ability for participants to share their screens and work together to provide their own notes as required.
On top of this a team chat feature allows for file sharing, a searchable history, and a ten year archive. Meetings can also be escalated into one-on-one calls.
Security is built-in, using 256-bit TLS encryption for both meetings and shared files, and automated scheduling can be done from Gmail, Outlook, and iCal.