CompTIA LX103
Cisco ICND1
Cisco ICND2
Various
Labs
GNS3 - Graphical Network Simulator for Win / Mac / Linux
r/CCNA - CCNA subreddit
http://forums.unigild.com/index.php?/topic/98229-%D0%BA%D1%80%D0%B8%D0%BF%D1%82%D0%BE-%D0%B8%D0%B3%D1%80%D1%8B-%D1%82%D0%B5%D0%BB%D0%B5%D0%B3%D1%80%D0%B0%D0%BC/