I have a collection of miscellaneous scripts in my ~/bin.

• xuniq — print only unique lines of input, without requiring that the input be sorted (preserves ordering).
• joinlines — remove newlines from input. Sort of like xargs echo, but it can preserve trailing whitespace.
• diskusage — awk wrapper around du, to print out disk usage in a vaguely-useful format (i.e. ordered properly and in human-readable units, something that’s not possible with just du and sort alone, as the units break the ordering).

And much much more! Mostly undocumented and half-broken.

Available from git.