Check out some of the latest makeuseof discoveries. All listed websites are FREE (or come with a decent free account option). No trials or buy-to-use craplets. For even more app reviews subscribe to makeuseof directory.

(1) FileSuffix – Reference directory that lets you identify any unknown file format and find out which programs can open it. You can search for an extension using the search engine or browse file formats alphabetically. Read more: FileSuffix: Identify Unknown File Formats

(2) HowToCleanStuff – This site lists 100′s of how-to guides for cleaning everything from clothing to kitchen appliances. You can browse cleaning guides by category or search using relevant keywords. Every cleaning guide consists of step-by-step instructions and includes a list of needed materials. Read more: HowToCleanStuff: Cleaning How-To’s and Tips

(3) IsDueOn – Web service for tracking bill payments online. It will monitor your bill due dates and send you notification emails, as well as notify you on Twitter and via SMS. Read more: IsDueOn: Tracking Bill Payments Online

(4) Planyp.us – Online tool that makes group planning easy. You simply start a plan (wiki page) and then invite others. They can contribute by posting comments, voting on polls and plan ideas with a single-click. Read more: Planyp.us: Wiki Style Group Planning

(5) Taggify – Allows anyone to upload a group photo and then match individual faces on the photo with corresponding names. Later, when viewers move a mouse cursor over the matched face they get a tooltip showing few details about the person. Read more: Taggify: Tag Faces on Photos with Tooltips

These are just half of the websites that we discovered in the last 3-4 days. If you want us to send you daily round-ups of all cool websites we come across, leave your email here. Or follow us via RSS feed.

Tagged: cool web apps