DesignWoop welcomes this guest post by Tomas Laurinavicius.

Since the iPhone and iPad entered the market you can hear lots of news about apps for these devices. Tons of apps available today and you can find everything you want. But today I would like to share 10 handy web-based apps for designers. To use these apps you don’t need to buy an iPhone or iPad, you can use them without any additional software or device, you just need a web browser. In this collection I’ve picked 10 useful and time-saving web apps for designers. These will help you to create an invoice, record a video or select a beautiful color combination for your next project.

Invoice Bubble

Invoice Bubble is free invoice software that lets you create an invoice and send to your client in seconds. It’s totally free online invoicing that is supported by ads which you can switch off for just $5 per month.

Gridulator

Tell Gridulator your layout width and the number of columns you want, and it’ll spit back all the possible grids that have nice, round integers. There are inline previews, courtesy of the canvas element, and when you’re all set Gridulator can crank out full-size PNGs for you, ready for use in your CSS, Photoshop docs, or what have you.

Browize

Useful tool for resizing current browser window size to set or custom resolutions. Works in Firefox, Safari, Internet Explorer and Opera.

Screenr

Screenr is a web-based tool that lets you create screencasts without installing any software. You just click the record button and your screen activity is recorded along with narration from your microphone. Useful tool to discuss or review designs.

Launchlist

Launchlist is intended to help and encourage web designers and developers to check their work before exposing it to the world at large.

Kuler

Explore, create and share color themes.Adobe Kuler – the web-hosted application for generating color themes that can inspire any project. No matter what you’re creating, with Kuler you can experiment quickly with color variations and browse thousands of themes from the Kuler community.

Favigen

Easily generate favicon for your website. Just upload your picture, choose favicon size and you’re done. Also you will find out how to implement it into your website.

Fillerati

Fillerati is a filler text generator that uses text from books in the public domain (from Project Gutenberg). You can grab heading, paragraphs, list items, and plain text.

Loads.in

Loads.in gives you the possibility to see how fast your (or any) website loads in a real browser from over 50 locations worldwide.

Domainr

Domainr helps you explore the entire domain name space beyond the ubiquitous—and crowded—.com, .net and .org. Pretty nice tool if you’re looking for creative domain.

What web apps do you use on a day to day basis?