Ping-API - Automated API testing and monitoring.
HTTPie for Terminal - Developers all around the world rely on HTTPie for API testing.
TestMace - Powerful IDE to work with API.
APImetrics - Simple, powerful, secure API performance monitoring
Appcircle - Download AppCircle apk 1.3 for Android. App Circle lets you share apps with friends and view apps your friends use.
Runscope - Log, monitor and measure your API usage to solve API problems fast.