Interested links:

        Linux:

1. http://www.opensuse.org

2. http://www.linux-bg.org/

3. ftp://mirrors.netbg.com/ - oficial Suse mirror from Bulgaria

4. http://packman.links2linux.de/ - Suse .rpm packets

        Electronic :

1. http://www.olimex.com/pcb/dtools.html - PCB Design softwares

2. http://gd.tuwien.ac.at/hw-related/hwb/ - Hardware book

3. Pdf datasheets catalog

4. http://www.discovercircuits.com/ - electronic schematics and circuits

        RC Models :

1. http://www.hobby-lobby.com/ - all in one

2. http://www.rctoys.com/