Do you want to extract files from a .rar archive, or create one?
In the first case, get izarc from http://www.izarc.org/
It's free, integrate with the Windows explorer, can extract from those formats: 7-ZIP, A, ACE, ARC, ARJ, B64, BH, BIN, BZ2, BZA, C2D, CAB, CDI, CPIO, DEB, ENC, GCA, GZ, GZA, HA, IMG, ISO, JAR, LHA, LIB, LZH, MDF, MBF, MIM, NRG, PAK, PDI, PK3, RAR, RPM, TAR, TAZ, TBZ, TGZ, TZ, UUE, WAR, XPI, XXE, YZ1, Z, ZIP, ZOO. It can also create archives in most of those.
Electro, July 2012
