Which is the cache I have to clear to refresh list of view blocks? I created a new block (a view block) but it is not available to use in other modules (like panels). If I clear all cache then it shows up.

I don't want to clear all caches but only the right one to get the same.
If you use Drush you can clearly see there are cache for block and views. Clear both these cache and you will get the required result