MOBILedit!
Control your mobile phone from the PC via Bluetooth, infrared, or cable. With a simple click, backup all phone data, copy them to different mobile phones and manipulate your contacts without even touching the phone. When you receive an SMS, it arrives on your PC in a similar way as an email;... You no longer need to be concerned that your colleagues all have a different flavor of cell phone or about that trip where you planned to take your handy with you but couldn't consider dragging alone the PC.
http://download.mobiledit.com/mobiledit!/MOBILedit!.exe - 10Mb - Download - Screenshot

FastSMS III
FastSMS III is a simple, reliable tool for Short Message Service (SMS). This program sends text messages to the cell phones of any subscribers whose providers support the service. It has an exclusive and easy-to-manage interface adapted to SMS standards and offers you more extended features for... Using FastSMS III you do not depend on any SMS centers, sites or SMS gates, so it increases your message confidentiality and saves your time and money. ... The built-in phone book stores all your phone numbers and recipients.
http://simpleforce.net/fastsms/fsms33.zip - 881Kb - Download - Screenshot

MobiManager for Nokia Phones
Never loose valuable data again! Edit and backup your phonebook, view hidden security features, create your own logos and funky ringtones. MobiManager is the easy-to-use software for creating phone logos, ringtones, startup images and screensavers. Use it to backup and restore your phonebook,... If you use a Nokia mobile phone, MobiManager can help you edit your phone book; backup and restore the contents of your cellphone; personalise your cellphone with designer logos and customer ringtones; send logos and ringtones to friends and acquaintances; SMS your friends, business colleagues and...
http://www.mobimarketing.com/downloads/mobimgr.zip - 761Kb - Download - Screenshot

NexySMS
Have you ever though of how great it would be to type SMS with the easy computer keyboard you are used to instead of struggling with the tricky one on your mobile phone? How about sending SMS from your computer to mobile phones worldwide using your own phone number, not messing with all those... Enjoy the easy computer keyboard you are used to instead of struggling with the tricky one on your mobile phone. ... The support of vCard will let you send and receive the vCard data just like if you were doing that with your cell phone.
http://www.nexytools.com/download/NexySMS.exe - 2Mb - Download - Screenshot

SMS Create Pro
SMS Create Pro is a tool for sending text messages from a PC to mobile phones using Email service. Also, it is usefull in a case when sending text messages to a group of mobile phones. You can create your own phone book, edit mobile operators list. There are some mobile operators in the list... It can check new mail received and notify about that with pop-up message on PC, by sending a notification to a mobile phone number. ... Were added smiles and possibility of the run the Email client. ... The application has one more additional feature.
http://www.atlant-group.com/ru/program/sms.exe - 1Mb - Download - Screenshot

Convert to Ringtone Wizard
Convert your music files to WAV, MP3 and MMF ringtones and send them to mobile phone without cables. Convert to Ringtone Wizard allows you create polyphonic ringtones directly from WAV, MP3, WMA, OGG, APE and FLAC audio files. You can convert entire songs or select any part you prefer. ... Convert to Ringtone Wizard can place created ringtones to the folder on your computer and send them to your phone via the Internet without extra fees. ... Just pick your phone model to let the Wizard select ringtone format that fits your phone.
http://www.music-converters.com/ringwiz12.exe - 2Mb - Download - Screenshot

Cellular Essentials
Cellular Essentials helps you to organize your phone book entries in a professional way and to easily read, save and send your SMS messages including logos and picture messages. An excellent logo editor completes the features of this program. The data transfer between your cellular phone and PC...
http://www.demmel.com/download/cellular/celles20.exe - 3Mb - Download - Screenshot

CleverCell Phone Manager
CleverCell Phone Manager is an easy-to-use logging, multimedia and synchronization software designed for mobile phones. Every cell phone owner can take advantage of using this software! Program can automatically log and synchronize data of your GSM phone with PC. ... Key Features Logging of mobile data on PC, including all messages, call records, and contacts Multimedia Center for pictures and melodies management (On Mobile and PC) SMS messages management, SMS Sending Phone general information view Call Records management and archive Phonebook data management and synchronization with...
http://www.clevercell.com/en/download/clevercellpm12.exe - 1Mb - Download - Screenshot

SMSem
Send SMS text messages to cell phones. User configurable for any mobile phone provider, anywhere in the world.
http://www.yeohhs.com/shareware/smsem.zip - 373Kb - Download

SMSCaster E-Marketer
Send bulk SMS from PC to your customers via mobile phone connected to PC thru COM port ! SMSCaster E-Marketer is easy and powerful SMS message broadcasting software for electronic marketing purposes. It allows you to create and send bulk SMS messages to your customers with your mobile phone... This differs from other software which rely on an SMS gateway on the Internet for which you need to prepay SMS credits. ... Features: - Send SMS right from your computer, with your mobile phone directly. ... Benefits: low cost, no registration, no pre-pay and no need to buy any SMS credit before start.
http://www.smscaster.com/download/smscastersetup.exe - 970Kb - Download - Screenshot