Issabel vs Red Pen
A side-by-side look at Issabel and Red Pen. For an in-depth review of either product, follow the links below.
Issabel
Network & Admin
Issabel is an open-source unified communications platform that provides PBX, voicemail, fax, instant messaging, and other communication tools. It is built on top of FreePBX and the Asterisk IP PBX.
pbxvoipunified-communications
Red Pen
Office & Productivity
Red Pen is an open-source proofreading tool for identifying writing issues in documents. It checks for spelling, grammar, style, and localization issues in over 20 languages.
proofreadingeditingwritinggrammar-checkspell-check
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