>>A client wants me to add a facility for his application to exchange data with a website. The website's SDK calls for POSTs and returns JSON. Looks like either Chilkat or wwIPStuff will give me what I need for the communication, so looking for opinions. (If I go with Chilkat, I'll probably use Bill Anderson's new VFPX wrapper class for it.)

Rick's wwHTTP classes work really well; a few lines of code are enough to send and receive http or https content with no additional ActiveX or other dependency. Classes also provide email, ftp etc.

There's also Craig Boyd's vfpconnection.fll that some people swear by.

For txt: a lot of txt providers offer an email address that forwards content to txt recipients. The sending address is linked to your account, so pretty easy to manage without an explicit txt add-on.