Custom-Oriented Programs [Complicated tools with many settings and can save custom formats]
FFCoder is an easy to use program with a great preset list of devices. It boasts really sophisticated tweaks and allows converting multiple files at a time. It also has some let downs, for instance it is not very stable on 64-bit Windows systems. It also always makes Start Menu entries in the Administrator account, irrespective of which non-admin account is being used for installing it.
Hybrid Programs [It can handle both jobs]
iWisoft Free Video Converter
iWisoft Free Video Converter has a neat, tidy and easy to use interface. It boasts a collection of presets and also supports creating and saving basic tweaks. Some other editing features are also available, such as, cropping, splitting, joining and watermarking etc.
Freemake is an amazing software which allows converting the formats any video, audio, DVD’s, photos and even web embedded media files such YouTube and Google. It has a plethora of presets. It utilizes DXVA and CUDA (methods of hardware accelerated encoding) to enhance speed. This freeware also has some downers, such as the default installation of FaceMoods Toolbar.
It has presets for more than 100 devices, and allows converting to and from various formats. You can also do some tweaking and make custom profiles. One of the downer is that its interface is quite complex and difficult to understand. But after you get used to it and understand its features, then you will find it really useful tool. This tool is quite stable and setting to different settings is also very easy. If you want a portable version of this tool, then get LiberKey, which is a great portable application manager.
Online Conversion Websites [Upload a file, get it converted and then download it]
Zamzar is a free online tool for converting files. You are not required to download anything. It allows conversion of documents, photos, music, video, audio, e-Book, compressed and CAD formats.
Audio-only Programs [ With really simple interface]
Pazera Free Audio Extractor
It is an audio-only tool in the Pazera Video Converters suite. It allows conversion to many other formats.
It is one of the best converter which is really speedy and boasts many awesome features. It even allows editing the metadata of MP3 files before converting. A portable version is this tool is also available. You also have the ability of extracting audio from video files, and converting from a single source file to multiple outputs.
Device-Oriented Programs [Convert audio and video files for portable devices]
Miro Video Converter
This one is a really handy converter that supports a single file at a time. It has a really simple interface.
Pazera Video Converters Suite
It is a great bundle of various device converters. Every single converter is really easy to use, efficient, provide custom profiles, multiple-file support and simple text-based interfaces.