Telefonos WiFi SIP

Clipcomm - WI-Fi SIP Phone, Bluetooth SIP Phone, PSTN/VoIP dual mode SIP Phone, PSTN Lifeline SIP Phone, Dual Ethernet SIP Phone.
Free World Dialup WiSIP - Low cost 802.11b VoIP handset
IP Ware - The IP Phone WT is a wireless IP Phone handset with 2 line LCD display. The phone is designed for office or home applications where general calling capabilities are required. The IP Phone WT can be installed in 802.11b wireless LAN environment and registered to a SIP server or IP PBX. It is enabled to communicate with general SIP IP telephones, gateways, or voice endpoints.
SX Design - The SX Design SIP SDK version 1.3.0. The latest release adds a low cost, wireless SIP phone reference design making the SX Design SDK a complete hardware and software platform providing designs for wired and wireless, low cost IP phones and Analog Terminal Adapters.
TECOM - IP2050 can be installed in 802.11b wireless LAN environment and registered to a SIP server or IP-PBX. It is enabled to communicate with general SIP IP telephones, gateways, or voice endpoints.
VOB™ - World first Bluetooth based Cordless VoIP Phone SIP compliant.
Voxquick - 1 FXS SIP ATA-1000, 1 FXS; 1 FXO(PSTN pass-through) SIP ATA-1100
ZyXEL Communications - Prestige 2000W Voice over IP (VoIP) Wi-Fi phone supports open standard SIP (Session Initiation Protocol) of major SIP-based call servers, IP-PBXs and various VoIP client devices.

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Teléfonos celulares 3/4GSIP

FAHDTEL AB - Dual-Mode Wi-Fi/GSM/GPRS SIP Phone. 

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Teléfonos y adaptadores SIP

8x8 - Desktop Telephony Adapter
Advantage Century Telecommunication Corp - SIP Phone, SIP Gateway, SIP TA
Azatel Communications Inc - AzaCall200 - 2 Port, PSTN backup, Advanced IP Centrex Analogue Adapter and Router, 3 way calling etc. AzaDial - 1 Port, Dialup Analogue Adapter with Router. IPCall104 - 4 line IP Centrex Phone with Router.
Best Systems - ADSL router with 2 FXS ports. Bandwidth management, content filtering, advanced firewall, and 16 tunnels VPN.
Clipcomm - SIP Phone Adaptors (1port – basic / Wi-Fi extensible. 2port- basic/ Wi-Fi extensible, .4port- FXS / FXO)
Continuous Computing Corp. (CCPU) - Trillium® Session Initiation Protocol (SIP) enabled Asymmetrical Digital Subscriber Line (ADSL) modems that provide IP based voice and video capabilities over the broadband network.
Dosch&Amand - PC card allows the subscription of any DECT cordless phones to your PC/Laptop to use Internet Telephony through SIP provider.
Five Star Telecom - Unique SIP global telephone adapter works on dialup, dynamically portable
Grandstream Networks - HandyTone Analog Telephone Adaptor
Linksys(R) (a division of Cisco Systems) - Linksys Phone Adapter with 2 Phone Ports (PAP2), a Wireless-G Router with 2 Phone Ports (WRT54GP2) and a wired Broadband Router with 2 Phone Ports (RT31P2).  Both the Phone adapter and Voice Routers support SIP.
SIPphone Inc. - Call-in-One Internet telephony adapter
Sipura Technology - SPA-2000 - Sipura Phone Adapter - 2 port FXS

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Set Top Boxes

Ninelanes - Sedici -- The World's First All Programmable Multi-Codec, Triple-Play IP Set Top Box.  Supports very high quality H.323/SIP-based VoIP and video phone capabilities as software options.