plain text accounting software based on ledger(1) written in POSIX awk and shell.
ledger(1) is awesome but I only use a handful of the features it provides. This is kind of a test to see if I can make a ledger-like software using only awk and shell without it being really really hard and still being useful.
aledger command [options] file
command
balance display the current balance of all entries
--start specify the starting date (must be of form yyyy/mm/dd)
--end specify the ending date (must be of form yyyy/mm/dd)
register display a day-by-day register of cash flow
--start specify the starting date (must be of form yyyy/mm/dd)
--end specify the ending date (must be of form yyyy/mm/dd)
--monthly group the register by month
--weekly group the register by week