Cisco IP/TV - Video server and viewer which implements RTSP, RTP, H.261, and MPEG video. [Client and Server]

Columbia University rtspd - Supports serving of .au files via RTSP/RTP for Windows NT and Solaris [Server, source available]
Meta Description: [ rtspd is a RTSP server for streaming media using RTP ]

Darwin Streaming Server - Apple's open source streaming server and proxy. Supports RTSP/RTP serving of MOV files. [Server and Proxy, includes source]

Helix - Media delivery platform for streaming multimedia productions. Supports RTSP/RTP delivery of AVI, WAV, MP3, and MOV files, as well as RTSP delivery of RealAudio and RealVideo [Server, Proxy, and SDK; source available]

IBM RTSP Toolkit - IBM's toolkit is based on tools developed for video and other applications in 1995-1996. Their toolkit reflects the Unix philosophy of shells, processes and generic tools, and demonstrate a shell-based implementation of the protocol and its usefulness for non-multimedia applications. [Client, includes source]

404 Kasenna MediaBase - Video server with integrated content management and content distribution technology with MPEG-1, MPEG-2, MP3, and QuickTime media streaming. [Server]

Komssys - RTSP/RTP implementation for multimedia systems researchers who want to investigate protocols and operating systems issues [Server, Client, Proxy; includes source]

MPEG4IP - MPEG-4/ISMA interoperability suite produced by Cisco. Supports MPEG-4 Audio (aac), MPEG-4 Video, RTP, RTSP, MP3 (using RFC 2250). Includes client, server (Darwin), and encoding tools. [Client and Server, includes source]
Meta Description: [ MPEG4IP ]

Open Mash - Open Mash supports the Mash streaming media toolkit and distributed collaboration applications based on the Internet Mbone tools and protocols. [Client, includes source]
Meta Description: [ Open Mash supports the Mash streaming media toolkit and distributed collaboration applications based on the Internet Mbone tools and protocols. ]

QuickTime - Apple's multi-platform multimedia software architecture. Supports RTSP/RTP with H.261, H.263, MPEG 1 Video, Layer 1 and 2 Audio, DVI, mu-Law, a-Law and others. [Client, includes source]

RealPlayer - RealNetworks cross-platform multimedia player. Supports RTSP/RTP with H.261, u-Law, a-law, MP3, DVI. [Client]

500 RTSP Monitor - Tool to check the availability of time-based media files and real-time media streams. Written in Java utilizing JMF.

500 RTSP Proxy Kit (RealNetworks) - An open source reference implementation of an application-level firewall proxy for UNIX. This kit includes all source code for the proxy and documentation for building and installing the RTSP proxy. [Proxy, includes source]
Meta Description: [ Information about the Real Time Streaming Protocol (RTSP), and about protocols for streaming servers, clients and infrastructure. ]

404 Sentivision RTSP/RTP Streaming Server - Provides real-time video content streaming to IP-enabled Set-Top Box hardware. Features include: multicast, UDP unicast, trick-play, and multiple codec support.

Sun Java Media Framework - SDK for adding streaming media to Java applications and applets. [Client SDK]
Meta Description: [ The Java Media Framework API (JMF) enables audio, video and other time-based media to be added to applications and applets built on Java technology. This optional package, which can capture, playback, stream, and transcode multiple media formats, extends the Java 2 Platform, Standard Edition (J2S... ]

Sun Streaming Server - Server implementation of RTSP, RTP/RTCP, and SDP. Delivers on-demand streams from hinted MPEG-4 (.mp4), hinted Apple QuickTime (.mov) and hinted 3GPP(.3gp) files. Live streaming is also supported via reflection of RTP sources (Free stream-limited server download)
Meta Description: [ Sun Software ]

404 Video on Demand - Java-based video server produced by students at Østfold College, Norway.

Vovida RTSP Stack - The Vovida Open Communication Application Library (VOCAL) is an open source project targeted at facilitating the adoption of VoIP in the marketplace. The Vovida implementation of RTSP includes an RTSP stack and server with playing and recording capabilities of *.au and *.wav file formats. [Client SDK and Server, includes source]

RTSP Monitor - Tool to check the availability of time-based media files and real-time media streams. Written in Java utilizing JMF.