Actually, I tried them all, from the mythical Beagle to Tracker. Beagle is now in effect a dead project. It was quite interesting, able to search many types of files and miscellaneous information, but personally I was not willing to use so many resources for Mono. Patience, they had developed from the outset with the standard libraries perhaps it might be on all computers. I tried other less known programs, Catfish, Pinot and some other that escapes me, cursed memory, up to lead to Tracker a searching program for files (and information) for Gnome. Until version 0.6 it seemed that someone had finally decided to engage seriously in the implementation of a program that allowed me to not always use the memory to remember which file or e-mail contained the information i was searching for. I was promptly denied (and betrayed).