Invoice Bubble is a free online invoice software that is perfect for freelancers and small businesses.

You can create invoices for your clients, keep on top of your payments and get paid online through PayPal!

ProCSSor is a web-based service with unique formatting styles and several customizable options to prettify your CSS.

It will empower you to turn your CSS into something that is visually more compelling, and with a minimum of effort at that.

You have following three ways to submit your CSS, each comes with increasingly advanced rules and indent properties.

• Paste your CSS directly into the box
• Upload your CSS file
• URL to the CSS file

ProtoFluid is a free web based tool that instantly lets you test web applications or websites on various screen sizes, orientations and browsers, particularly mobile devices. ProtoFluid is particularly suited to the early development of fluid layout based web applications.

Input the URL, select the screen size and the device (iPhone, Droid, Nexus One or iPad) and preview your website.

Features

• Lets you design for CSS3 compliant (mobile) browsers using Media Queries
• Encourages modern design flexibility
• Use all your favorite web browser development tools (Firebug etc.)

Maki is a tool for web designers that helps the transition from design to HTML / CSS code. Maki lets you overlay design mock-ups in the browser and see the adjustments you need to make, and tweak away until they match.

Maki, for sure, is an effective way to keep developers and designers on the same page from start to finish, ensuring that the final website matches the design layouts clients have approved.

ComparePSD is a must-have tool for Photoshop professionals, it compares two Photoshop PSD files and highlights the differences layer by layer and effect by effect.

Features

• Compares PSD files layer-by-layer
• Handles layers styles (effects), styles attributes and layers visibility flags
• Provides a scaled view of the files that helps you to find differences easier
• Allows you to select the files in Windows Explorer by right-clicking on them

If you’re building a multilingual website or application, you probably use language files. When you change content in one language file, you need to remember to update the other language files. Even with source control, this can get messy pretty quickly if you have many languages, many translators or a large site.

String was built to keep things organized. It can manage your language files – from PHP to PO to Rails to iPhone applications. You can now easily add languages and sections to your site. You can also invite users and control permissions.

String is free, with no project limitations. Invite as many users as you like. You’re free to extract all your data, close your project at any time and you can easily import and export projects.

Plaud.it is a free website stat & rank monitoring tool which provides multiple stats in one place and can play a vital role in the marketing strategy development.

It allows you to monitor multiple sites and check for stats such as Pagerank, Alexa Rank, Feedburner Subscribers and Twitter followers, etc.

Recommended:   10+ Website Speed & Performance Testing Tools & Plugins

Looking to host an online meeting without paying a single penny? Eager to provide remote technical support?

Mikogo is a free online web conferencing, screen sharing and remote desktop tool that offers true color quality across the world with up to 10 participants simultaneously.

This feature-rich web conferencing tool helps you to conduct:

• Online meeting
• Remote support session
• Group collaboration
• Web-based presentation
• Screen sharing for fun with friends & family

Mikogo is cross-platform so you can start and join online meetings from either Mac or PC computers.

WriteMaps is a free online sitemap generator that provides a visual playground to create, edit and share sitemaps online.

This online sitemap generator does not require any software, application or plugin to download or install.

You can create different sections and multiple pages inside sections. WriteMaps allows you to drag and drop your pages in other sections of your sitemap. It keeps track of all of your actions so you can always undo or redo.

Formee is a framework to help you develop and customize web based forms. Formee helps users to save their time they spent on aligning fields and calculating margins and paddings in a quest for a perfect web form.

Formee works with the technique provided by Fluid 960 Grid System to compose the form’s layout, allowing total flexibility to put it in any website or web system.

Web Forms Features

• Customizable and flexible
• Accessible and usable
• Cross browser and W3C compatible web forms