Here is the great list of websites and applications using which you can send SMS to your friends and family for free. You can also find deals to promote your products through some of these services. Some services may be country specific which allow you to send SMS only to selected countries.

Websites

Jaxtr allows us to send free SMS worldwide. The service is fast & message recipients can reply to your text message using their own cell phones or through a web link that’s included in the SMS message. The character limit is 65 words.

Atrochatro: This one is the easiest way to send an SMS, but it has a limit of only 2 SMS per IP address per day. It allows full length (160 characters) messages to anyone in India and the best of all no prior registration is required.

Gizmo SMS: Gizmo SMS is an web-based SMS service which allows users to send SMS to mobile phones in more than 65 countries on over 215 mobile networks from any web browser for free. It supports up to 80 characters.

160by2: Through 160by2 service, you can send upto 10 messages to a person in a day. It also has a limit of sending only 50 SMS overall in a day. It allows messages upto 80 characters.

IndyaRocks: It is an online and mobile based social networking site for connecting Indians across the globe. It has ability to send unlimited messages to registered or non-registered members. You can send up to 90 characters per SMS.

Gcalender: It’s a highly sophisticated way of sending SMS. It supports almost all the mobile subscribers, but before you can send an SMS to a mobile number you need to register your mobile number and obtain a verification code.

You Mint: You Mint is a free SMS service through which we can send SMS in India. We get paid for receiving promotional SMS, also get paid to invite other friends, the more number of friends you have in your network, the more free sms you can send. It supports up to 160 characters.

text4free: we can send free text messages from this website to almost anywhere in the world. Text 4 Free is an absolutely free sms messaging service. We can send 140 characters in one SMS.

bizhat.com: Bizhat.com allows us to Send Free SMS to Indian mobile phones. It supports 140 characters per SMS. We can send SMS only to the first 4 prefix numbers in the dropdown allowed in the site.

SpiceSMS: SpiceSMS offers free unlimited SMS to mobile phones in India we receive sms replies to our own mobile/cell phone. We don’t need to register in order to send free text messages to India. Message length is 160 characters.

KRIFY SMS:
We Send Free and Instant Short Messages to the Cell phones in India from anywhere in the world. It provides a web based interface by which one can send free sms to India, for all the supported mobile networks, absolutely free of cost. Message length is 100 characters.

Hai91.com: We can send free SMS to any mobile across India. we can also schedule SMS, save contacts, view sent sms and much more. We have to register in order to use the service. Message length is 130 characters.

Ibibo: Ibibo is a social networking site for showcasing talent, but if you register you can send free sms to anyone in India. You must link your mobile to your ibibo account. Can also send free text messages to groups. Message length is 90 characters.

ReminderPlanet:
It is a sms reminder service, once you register and verify your mobile phone number, you can send free text messages to Indian mobile phones. You can send the same message to multiple numbers. Message length is 80 characters.

Ringtones World: Ringtones2world.com provide free sms services to India, no registration required and supports up to 95 characters. Provide your number and the phone number that you want to send the free sms.

smsLoop: We can Send free text messages to India from any country in the world. We have to register to send free texts, but we can try the free sms service before registering. Message length is 100 characters.

Send-sms-now: Send-sms-now is a worldwide SMS Messaging service to Mobile. It allows up to 120 characters. we do not have to register to send free SMS but if you register you will get access to many useful options like: phonebook, history of sent messages etc. The list of supported countries and operators is changing constantly.

SendaFreeSMS: SendaFreeSMS is Spam Free Text Messaging service provider apart from various features. It allows sending SMS for USA and Canada. Size limit is 100 characters.

Pikamo: Pikamo allows you to send free messages online. Pikamo messages arrive with your Pikamo ID. When your recipients reply to you message Pikamo forwards it to you.

TxtDrop: TxtDrop is a free web based text messaging that enables users in the United States and Canada to send text messages with instant delivery.

SeaSMS: We can send free sms worldwide at SeaSMS, registration not required. SeaSMS offers unlimited quota for its users and supports up to 450 characters.

Teleword SMS: Teleword offers a free SMS delivery Worldwide. The offer is currently limited to 3 SMS per account and day and supports 100 characters per SMS.

Wadja free SMS: It’s a Mobile internet site lets you send free sms worldwide once you register and upload a photo. Advertisements are automatically placed at the bottom of all messages sent, and site is ad-supported too. Message length is 92 characters.

smsix.net: Send a message to all mobile phones worldwide for free. No registration required. Send a free SMS text from your computer to any mobiles. Message length is 135 characters.

freetxt: This website allows us to send free SMS worldwide. Just we need to pick up country name and enter the local number without any code. It supports up to 197 characters.

email2sms.ru: Using this service we can send free SMS to any cellular phone worldwide without any registration. We can send 140 Latin and 70 national characters in message text.

TextbySMS: TextbySMS is a fast, free way to send text messages to your friends, co-workers, and family worldwide. The message is usually received by cell phone within seconds.

CellOp: CellOp provides free SMS services worldwide. It does not require any registration.

Free Text Messager: Send free unlimited text messages to your friends, family or co-workers in the US, Canada and the rest of the world. No limit for number of characters.

Swisscom Mobile: Swisscom Mobile can send up to 500 SMSs free of charge every month and have access to thousands of great pictures. It requires registration and Message length is 160 characters.

Jungle SMS: Jungle SMS allows us to send 50 free SMSs worldwide (up to 178 countries). We need to register first in order to send SMS, text messaging service is very fast, but all messages contain an ad for Jungle SMS. Message length is 150 characters.

Cell Freak: The Cell Freak provides unlimited Free SMS messaging to mobile phones internationally with 160 characters in length. It requires registration to send SMS.

Mjoy: A worldwide free sms service for sending text messages from the mjoy.com website to any mobile phone in the world. You have to register, and you get an inbox to sort your messages and free sms with no limit to the message size.

txt2day:
Now you can send free text messages to almost any major cell phone provider in the world. Text message can be of 140 characters, it does not require any registration.

Yellowpipe: Yellowpipe allows us to send free SMS only in North America with 160 characters in length. We can send SMS to a mobile phone, fax machine, and IP address.

SMSCITY: Using this website we can send free SMS by registering into site for free, we can earn sms credits which allow us to send free sms.

Free Download SMS Applications:

cellity.com: Cellity is a worldwide free communication application that needs to be installed to send SMS. Cellity works in any country, with any phone, with any SIM-Card.

ICQ: ICQ is useful in sending free mobile messages to your friends’ & family’s cell phones, we need to have an ICQ number which requires installation of ICQ software.

MWSMS Sender: It is 100% free software to send SMS messages that can reach up to 800 characters. With this software, you can send free SMS to one or more destinations.

SMS Manager:
SMS Manager is used to send free SMS by installing the software. It is a freeware that supports windows98/NT/2000/ME versions.

SMS Send : It is  a freeware application to send a SMS message to a mobile phone all over the world for free. To tool, you need an Internet connection with a static IP address.

SMS Messengers (Downloads)

Yahoo Messenger: In order to send an SMS text message, you need to download Yahoo’s Instant Message Service. Open the Yahoo instant message service and log in using your username and password. You will only be able to send an SMS text message 144 characters in length.

Google Talk Instant Messenger: Google Talk is a text and voice instant messenger allows you to send instant free SMS. We can chat with family and friends over the Internet for free.

RediffBol Messenger Free SMS: It is absolutely free no charges are to be paid for SMS sent .Anybody can send SMS to anywhere in India. User of Rediffbol can send SMS to family members who stay in India, just need to download Rediffbol messenger and sign in.

Chikka Text Messenger: We can send SMS to mobiles around the world. Chikka Messenger lets us to use our PC for sending free text messages quickly and to mobile phones.

SMSCountry SMS-Messenger:With this SMS messenger you can send bulk SMS directly from your computer to all the major networks in the world. It’s the most convenient way and easiest to send SMS messages to your friends/family/business contacts.

Send Free SMS Worldwide as Email

Yahoo EMail Messenger: Yahoo Mail has added another feature of sending messages to your Mobile Phone. We Need to login to Yahoo Mail account click on the New Drop down and select Text Message then only can send maximum of 5 sms to a contact after which contact person needs to reply at least once and then we can send 5 messages again.

Email2SMS: Email2SMS is a 160by2 feature to send free text messages or SMS in India using Email Application. Launch email client (Outlook/ Gmail/ Yahoo etc). This email application should be connected to the email addressed you registered with 160by2.com. It supports maximum of 80 characters.

TeleFlip: TeleFlip is an easy way to send email to any phone. Just address it to [10-digit phone number]@teleflip.com. Also this service allows getting emails and choosing where you get emails from.

More links:
http://teck.in/send-free-sms-worldwide-as-email.html

http://gizmodo.com/5100592/sms-touch-send-free-text-messages-through-email