Easy SMS is meant to send SMS messages through the Net2SMS service gateway. The script Easy SMS can send sms message, request delivery report, and get the balance of credits the service account. Easy SMS does NOT require CURL but it requires PHP at least 4.3 with OpenSSL support.
OpenSSLCrypt is a simple class that utilizes a public key and private key to encrypt and decrypt strings. It requires with OpenSSL support (configure --with-openssl).