Here's a bootloader: v3.0-bootloader-sansaclipplus-01.02.15-dual_boot.zip - I'm not responsible if your Clip+ catches on fire, kicks your puppy, etc.
Current firmware builds can be found here:
http://build.rockbox.org/data/rockbox-sansaclipplus.zip (This link is automatically updated whenever a new revision is released.)
Installation instructions: Unzip both files, bootloader and firmware, to the root of your Clip+. That's all. The Clip+ has to be in MSC mode, not MTP.
source :
Rockbox: Clip+ - Sansa Clip / Clip+ Rockbox - abi>>forums
edit: just to keep the thread alive
off late my sansa clip + on latest firmware 1.02.15 have been acting very oddly , just stops playing sings , hangs up very easily , so rockboxed it , did like the rockbox interface on small sansa clip+ screen , neverthless , the problem shown by stock firmware is gone , working fine with rockbox,
have anyone faced similar problems with their stock sansa firmware like hang ups, not refreshing media , hang up while changing tracks etc...