nc­cbbb – "Poor man's" black­board bold

The pack­age im­ple­ments about as good “poor man’s” black­board bold as one can hope. The cap­i­tal let­ters (com­mands \bbba to \bbbz) and a cou­ple of dig­its (\bb­bzero and \bb­bone) are avail­able.
How­ever, the au­thor sug­gests that users should switch to the ams­fonts pack­age.
This pack­age is part of the nc­c­tools bun­dle.