This issue is supposed to track features that will be removed by #3334.
Feel free to update.

(marked means, work on gnrc version has started)

• posix sockets
• TCP
• AODV (aodvv2: port to new network stack #3445)
• OLSR
• NHDP (uses socket_base, fixed in nhdp: use conn instead of socket_base #3876)
• RPL (ng_rpl: port to the new network stack #3050 et. al)
  • (subparts of RPL?)
• cc11xx support (drivers: add cc110x driver #3716)
• cc2420 support (drivers/cc2420: initial netdev port for cc2420 #3915)
• econotag-support (though it wasn't very stable to begin with)
• CCN-lite
• mainpage.txt transceiver documentation
• oonf API (uses socket_base, and is used by NHDP, fixed in oonf_api: adapt for new sockets #3882)

edited by @OlegHahm: OLSR was never part of RIOT master.