ridhwanahsann

RMGCaptcha Math Guard adds a GDPR-friendly, math-based CAPTCHA to protect your forms from spam and brute force. No external services, no tracking, and fully WordPress.org compliant.
Features:
<ul>
<li>WordPress login protection (captcha on wp-login.php)</li>
<li>Contact Form 7 integration via [pmcMathcaptcha] / [pmcMathcaptcha*]</li>
<li>WooCommerce login and registration protection</li>
<li>Configurable difficulty and operations (Addition/Subtraction/Multiplication/Random)</li>
<li>Hide captcha for logged-in users</li>
<li>Custom error message support</li>
<li>Optional rate limiting and honeypot</li>
<li>Failed login log + logged user list (admin pages)</li>
<li>Translation-ready</li>
</ul>

RMGCaptcha Math Guard

A lightweight math CAPTCHA for WordPress login, Contact Form 7, and WooCommerce forms.

cityjin

kirkpatrick

advanpix

Insert formulas & graphics in the posts and comments using native LaTeX shorthands directly in the text. Inline formulas, displayed equations auto-numbering, labeling and referencing, AMS-LaTeX, <code>TikZ</code>, custom LaTeX preamble. No LaTeX installation required. Easily customizable using UI page. Actively developed and maintained. Visit <a href="http://www.holoborodko.com/pavel/quicklatex/" rel="nofollow ugc">QuickLaTeX homepage</a> for more info.
<ul>
<li>Standard LaTeX expressions can be cut and pasted directly into WordPress posts, pages, and comments; display environments require no enclosures, other expressions require only a surrounding <code>$..$</code> or <code>\[..\]</code>. No need for enclosing tags <code>[latex] ... [/latex]</code>.</li>
<li>Correct vertical positioning of inline formulas relative to baseline of surrounding text. Say “NO” to jumpy equations produced by other plugins!</li>
<li>SVG vector graphics support, so that formulas are crisp regardless of scaling in browser.</li>
<li>(AMS)LaTeX displayed math environments support: <code>equation, align, gather, multiline, flalign, alignat,</code> etc.</li>
<li>Automatic numbering of displayed equations. Override autonumbering with <code>\tag{}</code> LaTeX command.</li>
<li>Equation hyper-referencing by standard LaTeX rules with <code>\label{}</code>, <code>\ref{}</code>.</li>
<li>Custom LaTeX document preamble, allowing added <code>\usepackage{}</code> and <code>\newcommand{}</code>.</li>
<li><code>TikZ</code> and <code>pgfplots</code> graphics package support.</li>
<li>Preview formulas in comments before publishing. Additionally <a href="http://blogwaffe.com/ajax-comment-preview/" rel="nofollow ugc">AJAX Comment Preview</a> plugin should be installed to enable this feature.</li>
<li>Meaningful error messages for mistakes in LaTeX code.</li>
<li>Precise font properties tuning: <code>size, text and background color</code>. </li>
<li>Easy style customization using UI or CSS file.</li>
<li>No LaTeX installation is required. </li>
<li>QuickLaTeX.com automatically provides formula images, which are then cached on user’s server.</li>
<li>Administrative settings page for setting global parameters; AJAX-ified.</li>
</ul>
Just place LaTeX math expressions into your text and enable QuickLaTeX on the page by <code>[latexpage]</code> command. 
WP QuickLaTeX will convert them to high-quality images and embed into post. Inline formulas will be properly aligned with the text. 
Displayed equations will be auto-numbered by LaTeX rules. 
To see plugin in action please visit math-pages on my blog, e.g. <a href="http://www.holoborodko.com/pavel/numerical-methods/numerical-derivative/central-differences/" rel="nofollow ugc">Central Differences</a>, 
<a href="http://www.holoborodko.com/pavel/numerical-methods/numerical-integration/cubature-formulas-for-the-unit-disk/" rel="nofollow ugc">Cubature formulas for the unit disk</a>, <a href="http://www.holoborodko.com/pavel/numerical-methods/numerical-derivative/smooth-low-noise-differentiators/" rel="nofollow ugc">Smooth noise robust differentiators</a>, etc.

WP QuickLaTeX

Advanced LaTeX plugin. Native LaTeX syntax. Allows custom preamble, TikZ and other packages. Zoom-independent visual quality (SVG).

RMGCaptcha Math Guard vs WP QuickLaTeX