Anyone used LedgerSMB, SQL-Ledger, Compiere, OpenERP, Postbooks, or other FLOSS accounting packages? If so, any opinions on which one(s) are worth checking out? I'm looking for something that I could integrate with Mifos (loan/savings/portfolio tracking software for microfinance institutions). I'm not looking for personal finance software like GnuCash, KMyMoney, etc.--concurrent access must be supported.