JetBrains AI Assistant
AI Tool · Extension / PluginCredit-metered AI chat, commit help and the Junie agent inside JetBrains IDEs
Freemium · from $10
Best Free Extensions & Plugins in 2026 – Page 2 | DevMixa
The best free and freemium Extensions & Plugins, tested by our team — with free plan limits and ratings.
42 tools listed · Updated October 2026
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Mangools
SaaS / Web App · Extension / PluginFive beginner-friendly SEO apps for keywords, SERPs, rank tracking and backlinks
Freemium -
ProWritingAid
SaaS / Web App · AI Tool · Extension / Plugin · Desktop SoftwareGrammar checker and style editor with 25+ reports, built for long-form and fiction writers
Freemium · from $30 -
Speechify
SaaS / Web App · AI Tool · Mobile App · Extension / Plugin · APIListen to PDFs, web pages and scanned books with 1,000+ voices at up to 5x speed
Freemium · from $29 -
Jetpack
Extension / Plugin · SaaS / Web AppAutomattic's all-in-one WordPress plugin for backups, security, stats and growth
Freemium · from $9.95 -
Keywords Everywhere
SaaS / Web App · Extension / Plugin · APIKeyword volume, CPC and trend data printed on Google, YouTube and Amazon as you search
Freemium · from $7 -
LanguageTool
SaaS / Web App · AI Tool · Extension / Plugin · APIMultilingual grammar and style checker with an open-source engine you can self-host
Freemium -
Ubersuggest
SaaS / Web App · Extension / PluginBudget SEO suite from Neil Patel with a one-time lifetime option
Freemium · from $29 -
Akismet
Extension / PluginAutomattic's cloud spam filter for WordPress comments and contact forms
Freemium · from $9.95 -
Contact Form 7
Extension / PluginFree, code-friendly WordPress form plugin with Stripe, Turnstile and Akismet support
Free -
LastPass
SaaS / Web App · Desktop Software · Mobile App · Extension / PluginPassword manager with a free one-device-type plan, Premium from $3/mo and business tiers
Freemium · from $3 -
Similarweb
SaaS / Web App · Extension / PluginEstimated traffic, channel and audience data for any website, with SEO and ad add-ons
Freemium · from $125 -
Wappalyzer
Extension / Plugin · SaaS / Web App · API · Mobile AppFree tech stack detector extension with paid lead lists, CRM enrichment and an API
Freemium · from $10 -
Rytr
SaaS / Web App · AI Tool · Extension / PluginLow-cost AI writer for short emails, captions and ads, now with a relationship assistant
Freemium · from $9 -
Amazon Q Developer
SaaS / Web App · AI Tool · Extension / PluginAWS's coding assistant, closed to new users and retiring its IDE plugins in April 2027
Freemium · from $19 -
Honey
Extension / PluginPayPal's free checkout extension that tests coupon codes and adds rewards points
Free -
Continue.dev
AI Tool · Extension / PluginOpen-source coding assistant for VS Code, now frozen after its team joined Cursor
Free -
Wordtune
SaaS / Web App · AI Tool · Extension / Plugin · Mobile AppAI sentence rewriter for cleaner English, with tone, length and summary tools
Freemium · from $4.89
How we rank extensions & plugins
Tools we have tested hands-on are ranked first, by our overall score (ease of use, features, value and support). Listed tools that we have not tested yet show no score. Pricing on every review is checked against the official pricing page, with the date shown. Sponsored placements are labelled and never change a score.