Development of contact manager SMS sending software

We require the development of a windows desktop software (source code is a must) prewritten or newely developed that performs following functions: contact list management group/list/category management contact and group sms sending (can just put sms's in files to be sent by an sms gateway) inbox/outbox/sentitems management Other features are welcome you can take a look at those softwares: [login to view URL] [login to view URL] Development language can be C# or Delphi for axample (open to suggestions) PROPOSAL REQUIREMENTS: We require application development. Submit cost and delivery time It must include the description of the application (screenshots is a plus for choosing bidders) We require delivery of a readable and documented source code