Free and easy to use Radio Alarm Clock for Android 4.1 and newer
Radio Alarm Clock++ - the purchase version with many additional features and a much nicer layout (Android 4.1 and higher)
Programs provided here require Java.
You may download the current version of the java runtime environment (JRE) from Oracle's website.
GUI .jar files can be executed via double-click or console: java -jar [filename.jar]
Program for Celsius <-> Fahrenheit conversion:
Tool for hash calculation and comparison of
files < 2 GB, hashing methods: MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512: