Since there isn't a single definitive "article" under this exact name, What is iBilling?

for a specific feature within iBilling, or are you looking for a different type of billing software

ibilling500

: Refers to version 5.0 of the iBilling software.

The "500" in the query likely refers to an older version (e.g., v5.0.0). Modern billing software requires constant security patches to stay compliant with payment gateways (like Stripe or PayPal). Using an outdated, cracked version leaves your payment portal vulnerable to exploits. 3. No Technical Support