I don’t know how you searched, but the all mighty GOOGLE gave 630 results and the first one tells you exactly what it is.

Process File: fsg_4104 or fsg_4104.exe
Process Name: Trickler
Description: Application that is associated with the file sharing software iMesh. The application has many versions.
Company: The Gator Corporation
System Process: No
Security Risk ( Virus/Trojan/Worm/Adware/Spyware ): Yes