Communication And Messaging/Video
freeware
ooVoo
ooVoo is a multi-user video chat application which supports up to 6 users simultaneously. You can also send and receive video messages and files to other ooVoo users and even send video messages to users who don't have the software installed.
shareware ($20}
WebcamMax
WebcamMax can stream videos, movies, flash, desktop screen, pictures to virtual webcam; add floating text, frame, transform, emotion effects over real webcam.
shareware ($199}
123 Flash Chat Server Software
123 Flash Chat Server Software starts with a 100% pure Java server, making it a cross-platform application with reliability and high load support. With the 100% pure Flash client, it provides a skinable interface and improved speed over regular chat. It can fully integrate your existing user database, with an auto-login feature. PHPDB, PostNuke, PHPNuke, VBulletin, and more databases can be integrated and chat modules are available for you to download. I supports moderated chat, Ad banners, low port and...
freeware
Loudtalks
Loudtalks brings voice back to the Internet communications. It's a little application, which allows you to talk to your friends or colleagues instantly with a single touch of a button. Think walkie talkie. It's faster than text chat and more convenient than calls. It supports one to one and one to many communication. Incoming messages could be re-played. The application is fast and lightweight and doesn't require any configuration.
open source
Mumble
Mumble was made to improve voice communication in games. This program features shorter delay and better implementation of Speex than most other free clients. Plug-in support for postional audio in games has been implemented, and it comes with a plug-in for Battlefield 2. Installer includes the client Mumble and the server Murmur.
freeware
Gizmo
Gizmo uses your Internet connection (broadband or dial-up) to make calls to other computers. With the click of a mouse, you're connected to friends, family, and colleagues anywhere on earth. It's just that simple. You talk clearly for as long as you want for free.
With inexpensive add-ons like Call In and Call Out, you can talk to any telephone, mobile or landline on the planet.