Google Voice This app allows you to make cheap international calls with your Google phone numbers. You can send free text messages, place calls, and send texts that show your Google number. You can also listen to voicemail and read transcripts.

Recordoid Dictaphone Lite You can record audio and voice from microphone and notes. You can also send e-mails, save and view recordings and set ringtones.

Dictosyl - Voice Recorder Dictate anything to your phone and send your dictations to anyone by email.

Call Recorder, Text Saver Lite This app records incoming and outgoing calls of numbers you have selected. You can save them as an audio file in SD Card too.