title: "RL-ARM Library" and "CMSIS Library" alternatives
body: <p>I work with MCB1700 Evaluation board.
  Keil provides developer with RL-ARM Library.
  But some hours ago I founded CMSIS Librariy. It also has headers and c-files for USB, Ethernet etc. (with examples).
  What are the differences between "RL-ARM Library" and "CMSIS Library"?
  Are the alternatives of RL-ARM and CMSIS Libraries exist?</p>