SFTP Drive project

BACKGROUND: I have a file server where a member base can access it via FTP/SFTP third party clients. GOAL: I want to offer them a free, stable and easy to use SFTP client. NEED: I need a easy to install SFTP software that creates a extra drive in the computer. Basically a clone of the commercial software found here [login to view URL] but with less functions. -No license registration -Only SFTP support -Only be able to add one drive REQUIREMENTS: 1. Has to be cross platform. 2. Very easy with minimum clicks installation without re-starting the computer. 3. Preset server and port. only require to enter login. 4. Run as a service 5. File management as the commercial software stated above 6. Digital sign the software 7. Encrypted traffic via SFTP 8. Multilingual. You can develop in English, but make it simple to translate and add another language FUTURE REQUIREMENTS: (not included in this bid project) After a while when the software is widely used by the members, I want to release version 2. 1. option to Encrypt/decrypt files automatically when uploading/downloading to the server 2. Be able to sign-up via the software in addition to the web sign-up Note that the above is not requested right now, but it will help if you can consider to do it in the future so I can use the same developers for upgrades and such. After choosing a developer, I will provide with: 1. access to a SFTP server 2. a license of the commercial software to clone in case the 14 days trial has expired for you. 3. Color schemes and logos for design the software 4. SSL cert