What software applications have you used for accounts receivable?

i worked with double click  ERb for accounts receivables in my company 

Microsoft Navision Finance Module

Microsoft Excel Sheet Is use able 

We are using In-house software - Dolphin

microsoft excel spreadsheet

We are using a customized software called stock control 

We are using a customized software called Orison and previously it was Focus rt.

by using SAP as an ERP system, I guess it's almost covering most of the issues related to the Receivable part in the finance department.

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So, it means everyone is using different software to set the same goals

I've used (Mount Start) which relates to FedEx Co

from that App you will be able to check and control everything which relates to receivables, such as entries,trial balance, allocation, account analysis....etc