DD-WRT for R6300v2

Features supported:

Wireless Basic
Wireless Security
Wireless Bridging
WAN Configurable in STATIC, DHCP and PPPoE mode
Remote login (Telnet, SSH)
Remote Copy (SCP)
USB Storage Support
USB auto-mount Support (Single and multiple partition)
File System Support (VFAT, Ext2, Ext3, NTFS)
FTP
Iptables
Firewall
Firmware Upgrade
Factory Reset
Backup Settings
Reset Button
LED
OpenVPN Client
OpenVPN Server
VPN Passthrough
DDNS
SNMP
EPI-TTCP
NTP Client
ip command
Bandwidth Monitoring
WifiDog
GPT Support
Scheduled Reboot
Boot Wait
Cron
Syslog
MAC Address Clone
WOL
UPnP
NAT Loopback

Known Issues:

PPTP VPN
jffs2 Support
SAMBA

Link to Source