Visa types granted by Sri Lanka are;

• Sri Lanka ETA/eVisa
• Sri Lanka for Diplomatic and Official Visits ETA
• Sri Lanka Tourist visit Visa
• Sri Lanka Business visit Visa
• Sri Lanka Transit visa
• Sri Lanka Visa On Arrival
• Sri Lanka Electronic Travel Authorization (ETA)
• Sri Lanka Visa for Journalists
• Sri Lanka Residence Visa & Entry Visa
• Sri Lanka Short Term Visa

These articles might be helpful. Why not give them a look?

• Types of Sri Lanka Visa/ETA Available
• How to Apply for a Sri Lanka ETA
• Required Documents for A Sri Lanka ETA Application
• Sri Lanka ETA/Visa Policy
• Sri Lanka ETA Processing Time & Fee
• Sri Lanka Visa Extension